Yet Another Cycling Forum

General Category => Freewheeling => Folders => Topic started by: clarion on 25 August, 2015, 02:36:00 pm

Title: In Praise Of Dahon
Post by: clarion on 25 August, 2015, 02:36:00 pm
This board is in danger of turning into Bromptonland.

So, to introduce somce balance, I thought I would offer an opinion on our Dahon Vitesse HG7.  It's been languishing outside partly under a tarp, unused and ignored for far too long.

Then on Sunday, I dug it out, stuck some pedals on (once I'd got them both to turn on the spindle), soaked the horrible chain in WD40-a-like and treated it to a bit of Epic Ride oil.

It sprang joyfully into life!  :thumbsup:

Yesterday, I had the joy of riding out to get some lunch, and getting to a neighbouring hospital in between rain showers.  It's still undergeared, but I wasn't saying that as I struggled up the steep hill I climbed.  And today, I rode out again, this time in the rain, but it didn't matter at all.

I had a slight setback when the qr bolt on the seatpost binder pinged apart (when the bike was folded in the boot of a colleague's car, oddly), but I've swapped in another from one of the other Dahons in our fleet.  And now it performs excellently.

It's been commented that Brompton favour smallness of package over ride, and Dahon the other way round, and I'd agree with that.  I can't deny that my bike takes up more space than the Origami bikes.  But Oh what joy!  When we all alight from the train, and the men in suits are still fiddling with their twiddly bits as I am already wheeling my bike away fully proud and erect! ;)

Fast fold & unfold, fast and comfortable ride, and fun.  Sure, I need to get round to changing that cog, and maybe the hub, and I could do with a block on the front cause I have bag envy of the Helios.  And the saddle could be replaced by something a bit less sofa.  And I need to find a way to fit bullhorns because of my wrist/shoulder issues.

But it's a damn good bike.

Did I mention I had fun?  ;D
Title: Re: In Praise Of Dahon
Post by: robgul on 25 August, 2015, 02:58:14 pm
Hear, hear! 

I have a couple of Dahon built, Dawes badged, folders (one lives in my car and my wife's languishes in the garage with limited use) - excellent to ride with their 20" wheels, although the fold speed doesn't compare with a Brompton. 

I'm pretty big (that's tall you understand, not fat!) and have to say I struggle to ride a Brompton with any sort of comfort or pleasure - in contrast the Dahon is very similar to a normal machine.

Rob
Title: Re: In Praise Of Dahon
Post by: Kim on 25 August, 2015, 04:01:04 pm
I have a 20" wheeled folding BSO in the Dahon style (now languishing in the cupboard due to cheese failure), and BSO component issues aside, it was a much more comfortable ride than the average Brompton - especially on poor surfaces.  It's what got me back into cycling for fun.

Agreed about the tradeoff of fold vs ride.  The Sinclair A-bike is probably one end of the spectrum, and Dahon occupies a band of practicality somewhere in the middle.  The far end is poorly defined - naturally I'd be inclined to nominate the HPVelotechnik Grasshopper FX, but I reckon anything that leaves you with bits of bike hanging around loose[1] is dismantleable rather than a true folder (thereby neatly excluding all the proper bikes fitted with S&S couplings).  Montague maybe?


[1] Technically my Brommie falls foul of this due to QRD pedals.
Title: Re: In Praise Of Dahon
Post by: clarion on 25 August, 2015, 04:47:09 pm
I had a predecessor of the Montague - a Rudge Bi-Frame folding MTB (Montague held the patent on that fold, I believe).  Well, more of a hybrid, really, but it was good for towpaths & bridleways.  But that had to lose a wheel for a full fold, so fails the foldability test.

Moultons and Airnimals similarly, sadly.

But the Dahon Jack, Espresso, Cadenza & Dash all offer larger bikes with a proper fold.  The Dash has small wheels, too.  Looks most odd.
Title: Re: In Praise Of Dahon
Post by: Moultonaught on 25 August, 2015, 05:43:43 pm
here's mine.

(http://img.photobucket.com/albums/v637/westywagen/20150512_100948_zpsgoabpbs9.jpg)

donated to me by one of my fellow train commuters after the centre hinge catch and stem catch failed.

I prefer its ride (on Schwable Big apples) compared to my early (and very worn out) Brompton (that I was also given!  ;D) and it's nice to have a wider range of gears. For my current commute (1 mile to the stn and 6 miles and the other end)  the larger fold is fine and it's ideal...

I'd really like a Moulton F-frame stowaway as my train commuter, but having a separable bike rather than a folder wouldn't be the most sensible choice ....

Title: Re: In Praise Of Dahon
Post by: mike on 25 August, 2015, 06:56:26 pm
:)  by lucky happenstance I took this orange beauty to london today:

(http://i8.photobucket.com/albums/a19/mikes99mail/MRT_9314_zpsdaxm1pph.jpg)

It's great and I find it quicker and comfier than a brompton, but it doesnt fold nearly as well.  (I've also managed to x thread one of the pedals and it's not on straight.  Hopefully I can re-tap the crank... )
Title: Re: In Praise Of Dahon and other folders
Post by: Adam on 25 August, 2015, 07:14:48 pm
I haven't got a Dahon but I've inherited a Bickerton!  Almost mint, still with its original bag and instruction manual.

The ride is "interesting" but it's amazing how light it is compared to the Brompton.  And I managed to fold it first time, unlike the Brompton.
Title: Re: In Praise Of Dahon
Post by: Moultonaught on 25 August, 2015, 07:40:26 pm
A Bickerton was my first experience of folding bikes. Sadly the handlebar ends used to twist backward if undue pressure was placed on them and the frame used to fold itself whilst being ridden!!  :facepalm:

it currently lives in my FiL's barn. Much as I like quirky bikes, not being ridden is the best place for it...  :)
Title: Re: In Praise Of Dahon
Post by: fruitcake on 25 August, 2015, 08:07:45 pm
I've had three, and each rides better than the last.  First was a Kalkhoff branded 8 speed which looked good and accelerated like crazy, but rode somewhat harshly.

The Kalkhoff was stolen and I got an MU P8 as a replacement. Another alu frame but so much more compliant and with the curved frame design that gives a better handhold.

On a whim I then bought a 2007 Impulse featuring 24 speed transmission. It has an exceptionally comfortable cro mo frame with a mini top tube that serves as a carry handle, which can be seen in the images at the link. I don't think they make that model any more but I'd recommend looking out for used ones, if just for the frame.

http://cyclingfortransport.com/reviews/bikes/dahon-impulse-folding-bike/ (http://cyclingfortransport.com/reviews/bikes/dahon-impulse-folding-bike/)
Title: Re: In Praise Of Dahon
Post by: Pancho on 25 August, 2015, 08:23:20 pm
I have a Dahon Speed TR circa 2005. I quite like it but I don't really trust the lanky handlebar. Or, indeed, any of the hinges. The main hinge has raised lines in the paint around the hinge. I'm sure it's fine but once those particular brain weasels get going they're hard to dislodge.

So, if anyone wants a lovely but unloved Dahon, drop me a line. It has a hub gear derailleur combo which is ace - if hideously undergeared.
Title: Re: In Praise Of Dahon
Post by: fruitcake on 25 August, 2015, 11:20:00 pm
The main hinge has raised lines in the paint around the hinge.

Is it a steel frame?
Title: Re: In Praise Of Dahon
Post by: Morrisette on 10 September, 2015, 12:55:54 pm
I have a Dahon Curve, which I think has been discontinued though they are still available on various websites. It's a 16-inch wheeled model which Dahon don't make too many of but which IMO makes a lot more user-friendly for daily train commuting. It fits in the space by the door for a start, folded size is larger than a Brompton but not by a lot. I prefer the fold as there is no twiddling to get the bike unfolded. The ride is a little bit harsh but this is mainly due to the shocking state of the roads in Cambridge - on a nice smooth cycle path it's fine. It isn't a fast bike, but I am not a fast rider so this doesn't bother me too much. It has a luggage rack that a small pannier will fit on (and in fact today I have a large one on there). Heel clearance could be an issue for the larger-footed rider. I'd say a taller rider might struggle as well but for me at 5 foot 2 it's a much better fit than that previous Dahon I owned, which was a 20-inch Vitesse (which I sold on). It could be lighter for carrying but it's not too bad. I like it, I'd buy one again.

What I would REALLY like would be a bike that folds small enough for trains but that I could also ride home on (which is 16 miles including one long hill). I wouldn't want to do 16 miles on the Curve. Four is about enough, which is lucky as that's how far away the office is from the station! I did look at the large-wheeled Dahons but the fold is LARGE. I'd be very interested in a larger-wheeled bike (or one that rode like a larger-wheeled bike, including the ability to go up hills) that folded Brompton-style.....
Title: Re: In Praise Of Dahon
Post by: Zipperhead on 10 September, 2015, 02:15:19 pm
I have a Dahon Curve, which I think has been discontinued though they are still available on various websites. It's a 16-inch wheeled model which Dahon don't make too many of but which IMO makes a lot more user-friendly for daily train commuting. It fits in the space by the door for a start, folded size is larger than a Brompton but not by a lot. I prefer the fold as there is no twiddling to get the bike unfolded.

Assuming that you mean the Brompton clamp bolts....

In a fit of mad spending I bought some Bromptification (http://www.brompfication.com/40-hinge-clamp-set-titanium.html) hinge clamps for mine (hey, they save 20g by having titanium bolts!)

They very simple (so simple that I was disappointed in them at first and didn't fit them for a couple of weeks) but make a big difference. Just undo the hinges until the bolt stops turning, the clamp is then open just enough to allow it to fold but held in position so that when you unfold it you only have to turn the bolt.

Twiddling minimised and I'm very glad that I bought them after all.
Title: Re: In Praise Of Dahon
Post by: Wascally Weasel on 10 September, 2015, 02:24:18 pm
I had a Dahon Cadenza for a bit.  Bits fell off (including the magnet that helped keep it folded when folded) minutes after purchase.  Then after a few weeks of constant use, the fold started to go, in that under any sort of real power it started to fold while riding.

After a bit of back and forth, the retailer (Evans) offered me a replacement, following several attempts to get the fold to work properly and safely.  The same bits that fell off the first bike fell off the second bike shortly after leaving the shop.  Then after another few weeks of constant use, the same problems with the fold occurred and Eavans couldn't get it to work reliably so I got a refund.

It was shame because when it wasn't actually folding up on you while riding it was a great bike to ride and I enjoyed doing so very much until the fold went.  Evans were pretty reasonable in the way they handled the situation as I remember.
Title: Re: In Praise Of Dahon
Post by: LEE on 10 September, 2015, 02:33:02 pm
A Bickerton was my first experience of folding bikes. Sadly the handlebar ends used to twist backward if undue pressure was placed on them and the frame used to fold itself whilst being ridden!!  :facepalm:

it currently lives in my FiL's barn. Much as I like quirky bikes, not being ridden is the best place for it...  :)

Mr Bickerton's son works as the DAHON importer technical bod now. 

I know because I had a faulty handlbar clamp on my DAHON which we discussed (and he helpfully replaced) as well as chatting about his father. (Well, if someone at Dahon says their name is "Bickerton" you are inclined to ask the obvious question).
Title: Re: In Praise Of Dahon
Post by: drossall on 10 September, 2015, 09:53:48 pm
And mine:

(https://www.dropbox.com/s/9h8neks7ml9iar7/Dahon_small.jpg?raw=1)

Bought second-hand a year ago, at my friendly LBS. It's about a 2006 model, and apparently it had spent most of its life on a boat, not actually being used much. Now it goes daily into the Big Smoke with me. The colour is unusual for Dahon - it's been suggested that it may have been part of a special batch for some national chain store to sell.

I seem to keep changing bits :D I added MTB-style full bar ends quite quickly, and then I put FD-7 pedals on because my feet slipped on the rubber in the wet. I damaged the front brake owing to a short cable which led to the noodle pulling on the bridge that the cable feeds into, so I've got good Shimano ones on now. And I've just replaced the standard rack in the photo with the Ultimate (http://www.acycles.co.uk/dahon-ultimate-carrier-bag-rack-12877.html) one, to carry panniers properly, and the accompanying Stash Box (http://www.acycles.co.uk/dahon-stash-box-bag-12876.html).

Oh, and the cassette and chain wore out and the tyres needed replacing (with Marathons).

As I've said elsewhere, the ride must be OK. One pleasant summer evening, in a fit of enthusiasm, I set out from Islington to find the way to Potters Bar, being the edge of the roads I know. In the end I kept going and did 37 miles all the way home, in work clothes. It was fine. Later, I did the trip on a "proper" bike. It wasn't any faster...
Title: Re: In Praise Of Dahon
Post by: StuAff on 10 September, 2015, 10:39:02 pm
A Bickerton was my first experience of folding bikes. Sadly the handlebar ends used to twist backward if undue pressure was placed on them and the frame used to fold itself whilst being ridden!!  :facepalm:

it currently lives in my FiL's barn. Much as I like quirky bikes, not being ridden is the best place for it...  :)

Mr Bickerton's son works as the DAHON importer technical bod now. 

I know because I had a faulty handlbar clamp on my DAHON which we discussed (and he helpfully replaced) as well as chatting about his father. (Well, if someone at Dahon says their name is "Bickerton" you are inclined to ask the obvious question).
Mark Bickerton did work for Dahon- when the Tern split happened he became the Tern importer instead.
Title: Re: In Praise Of Dahon
Post by: StuAff on 10 September, 2015, 10:54:23 pm
Back on topic- Chutney my Speed Pro TT, formerly owned by Woolypigs of this parish. Rather less ridden than the rest of the stable, but certainly not the least loved, or the least useful. 10kg (well, it was before the rack went on), notably stiffer and quicker than my old Jetstream XP, and every gear I'll ever need thanks to the DualDrive hub. Made an effective touring bike in May with the addition of a Tern Cargo Rack. Fold's a bit clumsy (on account of those bullhorns) but it'll still go on any train.  Still puts a smile on my face every ride. Also had a Cadenza (2007 vintage, same as WW's), which was great- apart from needing the hinges replaced, think that's a theme!- until some scrote nicked it.
(https://farm7.staticflickr.com/6193/6058306447_98617eee9e_b.jpg)
Title: Re: In Praise Of Dahon
Post by: Pancho on 11 September, 2015, 07:41:55 am
The main hinge has raised lines in the paint around the hinge.

Is it a steel frame?

Yes.

Is that good or bad for the prognosis?
Title: Re: In Praise Of Dahon
Post by: fruitcake on 11 September, 2015, 09:20:23 am
I'd be happier riding a steel frame than an alu one with a potential issue of this kind.

If it's such a worry that it stops you riding the bike, you could take a slip of sandpaper to the paint to check the metal at this point. That would allow you see if the metal is split, or if they're lines of surface rust, or indeed if they're just cracks in the paint. Rust lines can be spot-treated.
Title: Re: In Praise Of Dahon
Post by: Ham on 11 September, 2015, 09:38:56 am
My Mu Uno, which I LuvLots, in its pre-pre-loved state.

(https://lh3.googleusercontent.com/-9Q1T0sAMXXk/VfKS31ZbffI/AAAAAAAAy8g/kb_-I9UFphw/s800-Ic42/dahon.jpg)

Perfect in its simplicity.
Title: Re: In Praise Of Dahon
Post by: nobby on 11 September, 2015, 10:08:31 am
I much prefer the ride of my Dahon Speed TR (2006 - I think) to my Brompton. I t goes on the train well enough for train out & ride home rides, and that's as much fold as I need.

Also have a Cadenza but I prefer the 20" wheels of the speed TR. Chris Bell, formerly of Highpath Engineering, has done many thousands of miles charity riding for cancer on his Cadenza using the fold to bag the bike for air travel and then using the bag as a camping mat. However, like Trigger's broom, he is on his third frame.



Title: Re: In Praise Of Dahon
Post by: LEE on 11 September, 2015, 10:55:22 am
But it's a damn good bike.

Did I mention I had fun?  ;D

Glad you're enjoying it.

Under-gearing seems fairly common, I know it is with my 3-speed Brommie.

Basically I think they are mostly geared for non-cyclists, with puny thighs.

This is probably the bike Clarion is referring to.  I'd still own it if it had folded down about another 2" lower so it could fit inside my trailer tent.

This is my marketing photo that enticed Clarion to part with his cash  :demon:
(http://i170.photobucket.com/albums/u249/freddered/Bike%20Stable/IMG_8531.jpg)

A bike like this, to me, makes perfect sense for families.  They pretty much allow anyone, of most sizes, to ride in comfort, obviate the need for bike racks on cars and, being hub-geared, are extremely resilient and low maintenance.  A squirt of oil on the chain every so often and they are ready for action at any time (as Clarion has proved).

The work of genius that is the Brompton Luggage mounting block should be adopted as an ISO standard and fitted to every folder imo. 
Title: Re: In Praise Of Dahon
Post by: nobby on 24 September, 2015, 09:03:20 am
The work of genius that is the Brompton Luggage mounting block should be adopted as an ISO standard and fitted to every folder imo.

I've fitted one to my Speed TR. :)
Title: Re: In Praise Of Dahon
Post by: Kim on 24 September, 2015, 01:16:57 pm
Under-gearing seems fairly common, I know it is with my 3-speed Brommie.

 :o


Quote
Basically I think they are mostly geared for non-cyclists, with puny thighs who pedal at lower cadences.

Is why I reckon they're mostly over-geared...


Quote
The work of genius that is the Brompton Luggage mounting block should be adopted as an ISO standard and fitted to every folder imo.

Agreed.  Any bike that will reasonably take one, really.  Kudos to Circe for making them a stock option.
Title: Re: In Praise Of Dahon
Post by: LEE on 29 September, 2015, 10:34:34 am
I think I got my over & under mixed up.

It's too spinny.

Title: Re: In Praise Of Dahon
Post by: jsabine on 29 September, 2015, 01:08:08 pm
I think I got my over & under mixed up.

It's too spinny.

I don't think you got 'em mixed up (spinny=under-geared) - but I do think you're wrong!

I prefer spinning, and find my Brom way over-geared, even for London use.

Must get a bigger rear sprocket for it - then I might actually use 3rd gear more than once in a blue moon.

Title: Re: In Praise Of Dahon
Post by: clarion on 29 September, 2015, 02:53:34 pm
I like spinning, but my Dahon runs out of gears quickly.
Title: Re: In Praise Of Dahon
Post by: Kim on 29 September, 2015, 11:08:20 pm
I like spinning, but my Dahon runs out of gears quickly.

I think it's hard to get a decent range out of a single derailleur without going to 9 speed or more.  My folding BSO (originally 5-speed, retrofitted for 7-speed 'megarange' when catastrophic cheese failure required a new rear wheel) suffered as soon as you ventured beyond North London.  I'd got the bottom end right, so it was lack of top end on the gentle descents that really bugged me.

Hub gears are the solution, of course.  With a Dahon it's easy to have a proper Nexus, rather than the Brompton-esque bodges.
Title: Re: In Praise Of Dahon
Post by: Ham on 29 September, 2015, 11:11:40 pm
I like spinning, but my Dahon runs out of gears quickly.

Never quite thought of it that way, but you are right, mine has completely run out of gears.
Title: Re: In Praise Of Dahon
Post by: drossall on 29 September, 2015, 11:27:35 pm
No problem with insufficient gears and spinning out on mine. Maybe that says more about me than about the bike, dunno :-[
Title: Re: In Praise Of Dahon
Post by: fruitcake on 29 May, 2016, 12:13:17 am
I've recently taken some parts off my Dahon. I was running a carbon seatpost for a while but I realised the original aluminium one had slightly more setback and more flex, which I liked. I've also swapped the full size pannier rack to the ArcLite rack which puts the rear load lower, and I have removed the front rack because I never used it. If you may find those parts useful, they are available to buy here (https://yacf.co.uk/forum/index.php?topic=97777)
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 02:02:36 pm
My teenaged dahon jetstream p8 was reburbed and upgraded to “p16”... and it works very well off road (muddy forest path, green lanes, gravel/stoned road) or in urban environment jumping curbs and going down a few steps. I put a custom 455 h900 hinge pin.

(https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/036a2605_1383_4520_8e84_f749a6ac21e3_e427148ef38eaffb271ba46cd955f8d07fd15e52.jpeg)
but it s heavy, 14kg.


So as i also have a helios 20” with 7 gears 11-28 and spare bits, i’m going to convert it into a speed pro TT or verges x30h /x18

to run these, I will fit road shifter/brake levers and litepro V brake pulleys.

the unknown is the handle bar, road drop down with the curved handle or TT bullhorn handle / speed pro TT.
so which one? What are the pros and cons?
I would grateful for any feedback especially regarding speed pro TT some of you ride.

I will be lightening the bike as much as possible.

tyres: i ‘m not sure whether refitting a set of marathon big apple or move to kojak (or similar).

this helios is going to be road orientated bike for longer rides, no curb jumping etc.

so please, advise me.

thanks
Title: Re: In Praise Of Dahon
Post by: LittleWheelsandBig on 23 February, 2020, 02:56:09 pm
Folding a Dahon with a bullhorn bar is noticeably more compact than with a drop bar. Unless you regularly use the drops (most don’t often get down on drop bars), a bullhorn is probably better.

Kojaks are lighter but not quicker than Big Apples. You’ll need more exotic tyres to gain extra speed.
Title: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 03:31:50 pm
Folding a Dahon with a bullhorn bar is noticeably more compact than with a drop bar. Unless you regularly use the drops (most don’t often get down on drop bars), a bullhorn is probably better.

Kojaks are lighter but not quicker than Big Apples. You’ll need more exotic tyres to gain extra speeds

Ok , so is there much point about bullhorn vs flat bar with ergos like my jetstream???
I read the the bullhorn can be hard on the back.
Folding capacity is not too much of an issue and bullhorn or drop down will protrude similarly unless i put a handle hinge that allow the horn to point vertically rather than horinzontally

I guess i could put a carbon bullhorn at a much cheaper cost than a carbon drop but if i stay in aluminium, cost difference is negligeable and frankly it will be a ebay job.


Tyre, i thought about  Schwalbe One Performance Raceguard .

https://www.tweekscycles.com/uk/schwalbe-one-performance-raceguard-wire-tyre-2008912/
Title: Re: In Praise Of Dahon
Post by: LittleWheelsandBig on 23 February, 2020, 03:50:29 pm
A bullhorn puts the brakes in hand for my most-used position, unlike a flat bar with barends. Bullhorns generally have enough forward extension, unlike most barends, hence your adaptor between stem and bars. Your bike already has a QR handlebar clamp to change bar angle.
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 03:53:26 pm
I don t have the original helios, i hav a TT with a weld bar stump .
I never liked the height adjutable version
Title: Re: In Praise Of Dahon
Post by: LittleWheelsandBig on 23 February, 2020, 04:02:59 pm
I wasn’t talking about height adjustment but instead handlebar angle. There have been a million variations on the theme of Dahon but many stems have had a QR for handlebar angle.

http://www.foldingcyclist.com/Dahon-Speed-Pro-TT-folding-bike.html
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 05:47:03 pm
Yes, there are these kits

https://foldingbike.biz/epages/7665e38c-067c-4fa0-9037-afac2266f927.mobile/en_GB/?ObjectPath=/Shops/7665e38c-067c-4fa0-9037-afac2266f927/Products/TERNDAHANDROSSTEMSIL

But when looking at the cost, it would be cheaper to fit a jetstream handle post.

If there are cheap kits, i’ll be interested.
At the moment, i have a litepro on the shelves
Title: Re: In Praise Of Dahon
Post by: drossall on 23 February, 2020, 05:54:01 pm
Sadly, as some here will know, my Dahon (pictured above) snapped in half near the hinge several years ago, and dumped me in the road:
(https://www.dropbox.com/s/6ua0i0hga876chi/Dahon-break-main.jpg?raw=1)
So I've jumped ship and bought a Brompton :-[

However, I do have this Tern Verge X18 for nice days when I fancy a ride back from work that's a bit more fun:
(https://www.dropbox.com/s/l9bc4ek05oimx2d/Tern_small.jpg?raw=1)
Title: Re: In Praise Of Dahon
Post by: drossall on 23 February, 2020, 05:55:51 pm
If there are cheap kits, i’ll be interested.
I've got one or two bits like that left from the broken Dahon mentioned in my previous post. Let me take a look.
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 06:02:27 pm
However, I do have this Tern Verge X18 for nice days when I fancy a ride back from work that's a bit more fun:
(https://www.dropbox.com/s/l9bc4ek05oimx2d/Tern_small.jpg?raw=1)

So how does it fold? Is the handlebar standard or from a teenager or may be lady road bike (smaller/lower profile)
I might invest in a kinetix  MU lightweight front  wheel
Title: Re: In Praise Of Dahon
Post by: drossall on 23 February, 2020, 06:31:16 pm
This video (https://www.youtube.com/watch?v=9nfUxazQym0) shows the basics, but for some reason doesn't include the final flip-down of the stem and bars, which is like any other Dahon. Of course the dropped bars stick out more than straight ones would, so it's not as compact. Yes, they're original - all I've done is add my own SPDs (and bottle cage).
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 06:37:06 pm
What sort of gearing has it got? I’d expect a 50+ T chainring and 11-32Tcassette???
Title: Re: In Praise Of Dahon
Post by: drossall on 23 February, 2020, 06:57:27 pm
Details here (https://www.ternbicycles.com/uk/bikes/471/verge-x18). Pretty decent gear range. The Capreo hub allows a very small top sprocket and hence the high top gear. To be honest I think it's a waste of time, and I'd rather have an Ultegra hub with an 11T or so, but overall it's a really fun ride.
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 07:16:56 pm
I have the following choice of chain ring
53T -39T rotor q rings
53T - 44T rotor q rings
50T - 34T std rings
Title: Re: In Praise Of Dahon
Post by: LittleWheelsandBig on 23 February, 2020, 07:23:45 pm
Our 406 Moultons run 58t big rings and 11t cassettes. Much smaller than a 56t is a bit depressing on a faster machine. Teethgrinder ran a 53t on a 11t Moulton for a while and was very happy to swap to a 56t ring.

The 9-26t 9sp Capreo cassette lets small-wheel folk use normal chainring sizes, as does Moulton’s expensive 10t cassettes. Both use a unique freehub design. The recent Shimano 10t cassettes help but use yet another freehub design and typically have excessively large cogs at the low end. The long arm rear mechs get very close to the ground.
Title: Re: In Praise Of Dahon
Post by: Fentuz on 23 February, 2020, 08:12:43 pm
I’ well aware that a 9 or 11 gear cassette would open further options but i don’t want to spend £100s on wheel, hubs, cassette, deraileur shifter etc.

It i was to do that... i’d sell the bike and buy a new one...  like a hammerhead
Title: Re: In Praise Of Dahon
Post by: LittleWheelsandBig on 23 February, 2020, 08:17:36 pm
I was talking about the size of the smallest cassette cog, not the number of cogs. A 9t top cog on a 406 wheel (particularly with a narrow 406 tyre) means you can use normal chainring sizes. An 11t top cog means an oversized chainring is needed to get a decent high gear on a road bike, as our Moultons do. You can get 11t top cogs on 7sp cassettes, if you like. The main way to get a 9t top cog is to use a Capreo cassette, as drossall’s Dahon does.
Title: Re: In Praise Of Dahon
Post by: ElyDave on 24 February, 2020, 06:21:06 am
I bought a second hand Dahon with Land Rover badging, thinking how cool it would be to get to the station and pull it out of the Land Rover,casseble it and ride off.

It was a bit tired, cut generally sound. I gave it a good clean, treated the rust spots, new brake and gear cables and outers, new brake blocks (tyres worn but sound marathons) and spent quite a lot of time getting the hinges and clasps to work properly.

That done, I rode it, once. Just didn't like the twitchiness and feeling of being perched on rather than part of the bike. I sold it for a profit.

I'll be ordering an airnimal in the next week or so.
Title: Re: In Praise Of Dahon
Post by: Jurek on 24 February, 2020, 06:30:58 am
My teenaged dahon jetstream p8 was reburbed and upgraded to “p16”... and it works very well off road (muddy forest path, green lanes, gravel/stoned road) or in urban environment jumping curbs and going down a few steps. I put a custom 455 h900 hinge pin.

(https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/036a2605_1383_4520_8e84_f749a6ac21e3_e427148ef38eaffb271ba46cd955f8d07fd15e52.jpeg)
but it s heavy, 14kg.


So as i also have a helios 20” with 7 gears 11-28 and spare bits, i’m going to convert it into a speed pro TT or verges x30h /x18

to run these, I will fit road shifter/brake levers and litepro V brake pulleys.

the unknown is the handle bar, road drop down with the curved handle or TT bullhorn handle / speed pro TT.
so which one? What are the pros and cons?
I would grateful for any feedback especially regarding speed pro TT some of you ride.

I will be lightening the bike as much as possible.

tyres: i ‘m not sure whether refitting a set of marathon big apple or move to kojak (or similar).

this helios is going to be road orientated bike for longer rides, no curb jumping etc.

so please, advise me.

thanks


Triumph TR1 in the garage?
Title: Re: In Praise Of Dahon
Post by: Fentuz on 24 February, 2020, 07:12:22 am
Frogeye 1960...
(https://uploads.tapatalk-cdn.com/20200224/480bf33fcd0a385e1201cb0fa3c6b18a.jpg)

I actually started with a dahon curve d3 because it fitted on the passenger seat on my previous 2 seater.
The jetstream used to fit until I fitted a fia roll cage.

I haven’t tried the jetstream in or on the frogeye yet.
Title: In Praise Of Dahon
Post by: Fentuz on 25 February, 2020, 12:45:04 pm
I was looking at the tern website, like dahon, they have letter such as
D, P, S, X follows by the number of gears.

What do these letters stand for?

Edit:
Deluxe
Premium
Extra premium.
Not sure about S.

My helios D7 and previous curve D3 have nothing deluxe about them, the components are basic bits you get with budget bikes...
The P ares definitely something else.
Title: Re: In Praise Of Dahon
Post by: Fentuz on 08 March, 2020, 07:26:39 pm
And 1 dahon rebuilt

(https://uploads.tapatalk-cdn.com/20200308/f33673cb8b6ad0b2fd2b3a87edf13578.jpg)

(https://uploads.tapatalk-cdn.com/20200308/5194951eb366fd64fcb25b04c086c96a.jpg)
Title: Re: In Praise Of Dahon
Post by: JBunyon on 22 May, 2020, 02:42:45 pm
Have a Dahon Mu XL Sport with 8 speed reduced hub gears. Lowest gearing about 24". OH has Dahon Mu 8 sped derailleur job. Both have toured southern Spain on 3 week trips with no probs. The most memorable thing on the trips(discounting the back country)was how we overcame transportation problems when we chose not to cycle. The bikes went in mini buses,buses and trains without any undue issues. The most impressive tale is when we arrived at a station to catch the Spanish TGV type-of-bullet train. When going to the desk to book the train tickets the booking clerk looked at the bikes and shook his head. It was no go. I signaled they folded. He wanted them folded. They were folded. But he wanted them in a bag. I had x2 plastic bags. He then wanted to see if we could lift them onto his counter. I put them on his high counter. We got the tickets.

Travelling with a full framed bike is too stressful. In Porto the guard said we were not coming onto his train,not with two panniered bikes. I said I was. We got on the train and stayed. I don't need that stress.

I like the look and style of Bromptons. I like their chic advertising. All things considered I could only use one if I lived in Melbourne,Aus. I would only have one if I also had the ex-factory hipster type $2 million dollar inner city home job. I would also have to be retired.
Title: In Praise Of Dahon
Post by: Fentuz on 31 May, 2020, 10:24:57 am
Well, the jetstream was converted into a chouchou train
(https://uploads.tapatalk-cdn.com/20200531/87ea2374b74f277e85da1050bc1ad1b3.jpg)

Could you do that with a Brompton, I was asked whether it would fit a brommy or not? I would be concern it would put too much load on the stem and frame (hence i did not fit it on the helios)

(https://uploads.tapatalk-cdn.com/20200531/2910ff22c413c3cec04191c3b743ea1c.jpg)