Author Topic: Disc brake road bike goodness.  (Read 100350 times)

Disc brake road bike goodness.
« on: 13 September, 2013, 06:24:22 pm »

Furious

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Re: Disc brake road bike goodness.
« Reply #1 on: 13 September, 2013, 07:08:32 pm »
I can't wait until disc brakes are commonplace on road bikes so hydraulic systems become affordable.
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mattc

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Re: Disc brake road bike goodness.
« Reply #2 on: 13 September, 2013, 07:14:06 pm »
UCI have just announced another couple of years of disc-free racing.

Presumably that will act as a large drag on their fitment to road bikes.
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Re: Disc brake road bike goodness.
« Reply #3 on: 13 September, 2013, 08:36:14 pm »
Nope.

I had a disc CX bike about 7 years before the UCI allowed it.

Re: Disc brake road bike goodness.
« Reply #4 on: 13 September, 2013, 09:24:42 pm »
I still think manufacturers are struggling to make lightweight forks strong enough to safely cope with small diameter disc brakes. 

In  performance terms hydraulic rim brakes make far more sense, but they are not what most want to buy to ride to work or on the club run. 

Road discs will happen because they will encourage enthusiasts to needlessly replace their current rim brake bike with the latest bling, and the UCi will cave in as soon as the industry decides it is time for them to.

Re: Disc brake road bike goodness.
« Reply #5 on: 13 September, 2013, 09:45:11 pm »
They never will make lightweight forks, physics prevents it. Disc forks are rigid (and uncomfortable)

mcshroom

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Re: Disc brake road bike goodness.
« Reply #6 on: 13 September, 2013, 09:56:02 pm »
and apparently dead straight looking at all those
Climbs like a sprinter, sprints like a climber!

Re: Disc brake road bike goodness.
« Reply #7 on: 13 September, 2013, 10:05:29 pm »
They never will make lightweight forks, physics prevents it. Disc forks are rigid (and uncomfortable)

Is that true of all disk brake forks?

I have 2 bikes with disk brakes. One is a mountain bike with suspension and without the suspension, it would be true. It is also very true of my other bike with disk brakes. They are both forks which have no rake.

I also have a Planet X Kaffenback cheapo steel frame which I intend to convert to disk brakes. The current forks I have are for V brakes and look very similar to the forks for disk brakes which do have some rake.

Bikey Mikey has a new bike with disk brakes. I never looked to see what his forks were like.

Furious

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Re: Disc brake road bike goodness.
« Reply #8 on: 13 September, 2013, 10:19:52 pm »
Bike brands unite to seek UCI Approval for disc brakes
But apparently UCI are not that bothered about reducing crashes.. just that mechanics might burn their fingers.  ::-)
Wer sein Fahrrad liebt, der schiebt.
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Cudzoziemiec

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Re: Disc brake road bike goodness.
« Reply #9 on: 13 September, 2013, 10:36:14 pm »
Every one of those bikes, and every other disc-braked bike I've seen, has wheels made of traditional separate rims, hubs and wire spokes. Why? As the rims aren't going to wear out, surely the whole wheel could be redesigned in one piece to eliminate the wire spokes, which seem to be the weak point, increase strength and decrease weight and drag.
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Rhys W

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Re: Disc brake road bike goodness.
« Reply #10 on: 13 September, 2013, 10:52:59 pm »
I had a disc CX bike about 7 years before the UCI allowed it.

And how many CX events did you ride in those 7 years?

Re: Disc brake road bike goodness.
« Reply #11 on: 14 September, 2013, 12:33:01 am »
You don't need to ride CX to appreciate the benefits of disc brakes................



Re: Disc brake road bike goodness.
« Reply #12 on: 14 September, 2013, 03:13:38 am »
Most Pinarellos and Colnagos won't see the benefit of discs anyway, they'll never see a raindrop or bad weather when discs really help. Most of them will only see summer sunshine, well set up DPs will stop a bike on fast descent in the dry well enough to throw you over bars if needed!

They need to fitted to normal road bikes and commuters with mudguards etc.
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PaulF

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Re: Disc brake road bike goodness.
« Reply #13 on: 14 September, 2013, 07:05:32 am »
They never will make lightweight forks, physics prevents it. Disc forks are rigid (and uncomfortable)

Is that true of all disk brake forks?

I have 2 bikes with disk brakes. One is a mountain bike with suspension and without the suspension, it would be true. It is also very true of my other bike with disk brakes. They are both forks which have no rake.


Don't think so! The forks on my Peregrine have some rake and I have no problems with comfort



Untitled by paulfulford, on Flickr

Re: Disc brake road bike goodness.
« Reply #14 on: 14 September, 2013, 07:10:47 am »
I had a disc CX bike about 7 years before the UCI allowed it.

And how many CX events did you ride in those 7 years?

None. Which is kind of the point.

tiermat

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Re: Disc brake road bike goodness.
« Reply #16 on: 14 September, 2013, 09:08:44 am »
It will be interesting to see if road disc equipped bikes settle on a 135 OLN standard too.  It would make a lot of sense.

PH

Re: Disc brake road bike goodness.
« Reply #17 on: 14 September, 2013, 10:23:46 am »
They are both forks which have no rake.

Are you sure you're not confusing rake with shape.  I have three very different shape forks, all with the same rake. Which is according to Sheldon;
The "rake" or "offset" of a fork is the distance between the wheel axle and the extension of the steering axis.

Though he also says that achieving the rake with a bend adds to the comfort as it acts as a spring, something I'm sceptical about.

PH

Re: Disc brake road bike goodness.
« Reply #18 on: 14 September, 2013, 10:27:48 am »

Don't think so! The forks on my Peregrine have some rake and I have no problems with comfort



Untitled by paulfulford, on Flickr

I would have thought that any flex in the frame or fork would be insignificant when compared to to that offered by your tyres.

Re: Disc brake road bike goodness.
« Reply #19 on: 14 September, 2013, 10:44:53 am »
I would have thought that any flex in the frame or fork would be insignificant when compared to to that offered by your tyres.
That's certainly what Mike Burrows says in his Bicycle Design book...

Re: Disc brake road bike goodness.
« Reply #20 on: 14 September, 2013, 11:47:37 am »
They never will make lightweight forks, physics prevents it. Disc forks are rigid (and uncomfortable)

Is that true of all disk brake forks?

Nope. My Croix-de-fer has slender pliable forks.
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PaulF

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Re: Disc brake road bike goodness.
« Reply #21 on: 14 September, 2013, 11:59:42 am »

Don't think so! The forks on my Peregrine have some rake and I have no problems with comfort


I would have thought that any flex in the frame or fork would be insignificant when compared to to that offered by your tyres.

Fair point but it was still comfortable when I ran it on skinny tyres

Cudzoziemiec

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Re: Disc brake road bike goodness.
« Reply #22 on: 14 September, 2013, 12:25:29 pm »
What are those tyres anyway? They certainly look impressive, especially in white.
Riding a concrete path through the nebulous and chaotic future.

PaulF

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  • It's only impossible if you stop to think about it
Re: Disc brake road bike goodness.
« Reply #23 on: 14 September, 2013, 01:29:00 pm »
What are those tyres anyway? They certainly look impressive, especially in white.

They're Schwalbe Big Apples. Great tyre, comfortable, grippy and they roll well

Re: Disc brake road bike goodness.
« Reply #24 on: 14 September, 2013, 02:53:00 pm »
It will be interesting to see if road disc equipped bikes settle on a 135 OLN standard too.  It would make a lot of sense.

Especially with more and more cogs appearing on the back