Yet Another Cycling Forum

General Category => Freewheeling => Velo Fixe => Topic started by: Crumbling Nick on January 07, 2017, 08:36:01 pm

Title: Need new sprockets; what's recommended now?
Post by: Crumbling Nick on January 07, 2017, 08:36:01 pm
I recently replaced chain, chainring & sprocket. The spares box is now distinctly short of replacement cogs. I use 3/32" chains & chainrings. Current cogs are 20t &22t. I have spare 19t & 21t from E.I.A. (Hubjub, back in the days of Will). 

I observe that E.I.A. seems to have disappeared. Hubjub have nothing that fits my requirements. I've naturally done a bit of googling & found some possibles. However I suspect that collective yacf wisdom might be a useful guide to quality (primarily concentricity - there are still Cyclo cogs out there) & durability.

What do folks suggest?
Title: Re: Need new sprockets; what's recommended now?
Post by: Deano on January 07, 2017, 08:42:19 pm
Hubjub still have EAI sprockets and they say the 20 and 22-tooth flavours are in stock.

I've found Surly to be pretty good too.
Title: Re: Need new sprockets; what's recommended now?
Post by: Crumbling Nick on January 07, 2017, 09:12:25 pm
Thanks for that one. I'd thought that the absence of E.A.I. in the cogs & freewheels section, plus a total failure of a google search for "EAI sprocket" meant that E.A.I. had folded. The E.A.I. section of the Hubjub site explains quite a bit, though doesn't yet encourage me to expect sprockets of any size. Which bit of the website have I missed?

Edit: - google for "Euro Asia Imports cog" gets me to Hubjub ( ??? ). No 3/32" cogs though.
Title: Re: Need new sprockets; what's recommended now?
Post by: Pichy on January 07, 2017, 11:30:15 pm
I like to think I've had good value from BLB's in-house Pista range but as I don't actually have anything else to compare it to this is only a guess.

On reflection, the above is about as much use as the proverbial chocolate cliché.
Title: Re: Need new sprockets; what's recommended now?
Post by: Crumbling Nick on January 08, 2017, 10:08:55 pm
I presume that the BLB Pista range don't suffer from lack of concentricity, otherwise you'd have mentioned it. Having lived with the eccentrcity of Cyclo cogs for a few decades, that is my biggest concern.

Durability is more complex. One the one hand the 20t EIA cog I recently replaced had lasted for about 22 000 miles, which was one chain too many. OTOH for several years I had an SJS alloy cog (definitely not politically correct) as the bailout gear, which probably did a couple of thousand miles without much visible wear, in complete contrast to a 46t Stronglight chainring which only lasted as long as one chain.

So all contributions gratefully received, even though I had a bit of a culture shock when I reached the components page of the BLB website  ;) .
Title: Re: Need new sprockets; what's recommended now?
Post by: chris n on January 17, 2017, 08:06:07 pm
Surly/Andel seem ok to me, though not as nice as EAI.
Title: Re: Need new sprockets; what's recommended now?
Post by: Crumbling Nick on January 25, 2017, 10:52:24 pm
Thanks Chris. It's what I'd suspected; it seems the UK market for 3/32" cogs has shrunk to a point of very limited choice.
It could be worse. I doubt that either Surly or Andel cogs are normally eccentric, since that should be a function of production machining procedures (give or take a bit of quality control), as opposed to the old Cyclo cogs, whose teeth, I suspect, were stamped, with inaccurate reference to the hub threads.
Title: Re: Need new sprockets; what's recommended now?
Post by: jamesld8 on January 26, 2017, 07:42:04 am
Is it possible run a 1/ 8 " chain on a 3/32 " chainring ? Currently my whole set up is 3/32" singlespeed and judging from comments above I may find it difficult to source a good quality non bank breaking priced  3/ 32" when time comes to replace existing 19T one

ta
Title: Re: Need new sprockets; what's recommended now?
Post by: sojournermike on January 26, 2017, 10:51:12 am
Is it possible run a 1/ 8 " chain on a 3/32 " chainring ? Currently my whole set up is 3/32" singlespeed and judging from comments above I may find it difficult to source a good quality non bank breaking priced  3/ 32" when time comes to replace existing 19T one

ta

Yes, I've done that. May not be a smooth as matching, but mine didn't fall off.

I may have a couple of cogs somewhere. I'll have a look and add them to the shed list if I get chance later.

Mike
Title: Re: Need new sprockets; what's recommended now?
Post by: Martymart on February 06, 2017, 10:33:44 pm
Is it possible run a 1/ 8 " chain on a 3/32 " chainring ? Currently my whole set up is 3/32" singlespeed and judging from comments above I may find it difficult to source a good quality non bank breaking priced  3/ 32" when time comes to replace existing 19T one

ta


Yes it is.

For a long time I had always run 3/32" but I wanted a change of ratio and came across a 1/8" 19 tooth Andel sprocket for only a few pounds. I bought a a basic 1/8" chain and now I am completely converted.

The whole system seems more fluid, definitely quieter and also more even in tension. I think that the chain being wider than the 3/32" chainring allows it a little sideways movement which is what works so well. Certainly for me anyway on my old Ellis Briggs 1984 frame.

As an aside, I also prefer the teeth profile iof the Andel sprocket over the EAI ones.