eurotrash666

i have some questions about setting up hubs for fixed gear use.
1) can a hub with standard freewheel threading be used for fixed gear (same thread as cog/lockring)?
2) what is standard spacing (f/r) for BMX hubs?

i would like to know if it is possible to convert a set of bullseye bmx hubs for fixie use on a frame spaced for 100/120 mm hubs.
thanks!

goatmeal

You could use the old BB lockring loctite method, but that isn't as reliable as a true track hub. BMX hubs are spaced at 100 front and back, which means you would have to replace the axle and add spacers in order to get the hub to work.

Bullseye hubs are super-primo though, I can see why you would want to utilize them, good luck.

Phil

Jonny B

BMX hubs are 110mm, not 100mm. Add a 5mm spacer to each side, the axle should be long enough to cope (BMX axles are a bit long to take pegs and thicker frame ends).

SSenorPedro

Do you guys think it would be possible to set up a FAQ section for the fixed board? Maybe just a disclaimer at the top stating you should do a search first? There are so many repetitive questions that could be easily answered -No offense to EuroTrash or anyone else.

Joe, what do you think?

wildjim

That is an excellent idea and suggestion. I would like to see a list of proven reliable parts as I am learning the expensive "hard" way. It would be nice to get it right the first time without depending on luck.

TheDL

Amen.

habitus

at least maybe have a sticky that directs new members to search the thread with keywords. this will provide them with the history of perspectives from our subforum on that topic.

edit: i meant search the subforum, not thread.

Cynikal 

I thought we did.....www.sheldonbrown.com . that's where I look when I have a question. I think building a FAQ sticky is a good idea but there would be much repitition with Sheldon's site. I would also expect to be conflict and disagrements on answers due to the various schools of thought on bike building on this sub-forum. But it's worth a shot.

eurotrash666

dang... thanks to goat and johnny for the info. didn't expect to turn this into a debate- i had no idea i would find such an elitist, exclusive circle in this topic. next time i have a question about s/s, i'll skip the forum and just go out and ride.

Cynikal 

Wow, I hope that was not aimed at me. I had no intention of being elitest by any means, I was just playing devil's advocate about a FAQ sticky on this forum. This idea has worked in other forums like the mechanic forum and would probably work in here. My only point was the endless rash of arguements that would break out over "which hub is better", "which tire is better", or "brakes or no brakes". But info on issues like hub sizes, will "700c wheels fit on a 27" frame", or "options for vertical dropouts" would be helpful. I would also be happy to contribute what little knowledge that I've picked up along the way.


Chris

eurotrash666

cynikal-
i agree that i would like to see a faq. i searched the forums for hub info, but did not find the answer to the specific question i had, esp. in regard to spacing. i have read sheldon's info, twice. a wealth of info, just not broad enough. sheldon is an... interesting fellow. i've also read his tech articles for the ACA. the net has some good info on conversions, riding technique, etc. but my question has not been addressed in anything i've come across. my last post was a comment on the fact that signal to noise was a paltry 20%, not a personal attack. i think i have ditched the notion of a conversion, and decided to buy some track-specific hubs. too bad they are all so light and thin- i am a big, strong fella and planning on building this rig mainly for street.

bostontrevor

Track hubs will hold up just fine. Most people don't torque their gear as hard as a pro track rider.

Michel Gagnon

Sheldon Brown suggests you could Locktite it in place. Since threads of a freewheel-hub are long enough for 2 cogs, my local repair shop has suggested to use as lockring the lockring used for bottom brackets. After a few trials, I have installed 2 track rings (a 18 and a 20), which I have screwed in tightly with a chain whip. The 18 is inside and is the most commonly used cog, and in that case, the 20 serves as a lockring. The 20 serves as a backup in adverse conditions (snow, wind...), which is why I installed it outside.

As far as safety is concerned, it's not a problem if you have brakes, and some say it's even not a problem without, though you don't have any safety device to prevent the cog from unthreading in hard braking. The simple lockring on a normal hub works almost as well as the track lockring.

eurotrash666

ah, now that's an answer! so, to recap: a bmx hub is spaced 110, which means the axle will have to be spaced. bullseye hubs are easy to lathe axles and spacers for, and 1cm of variance allows for manipulation of the chainline. und, completing my question, i now know there is in fact room for a cog and bb lockring, and the additional knowledge that they are the same thread.... it *can* be done, then, in theory. is it worth it? maybe as a rainy day project... ahh, resolution!

progre-ss

As mentioned before, I'm running a rear hub with a cog and a BB lockring plus loctite. Hasn't been a problem, even with skidding. Just make sure to crank that sucker down tight! And then tighten some more!

In regards to an FAQ, we could something similar to what we did on the SS board on MTBR.com as seen HERE.
Everyone gave info regarding converting, manufacturers, tips/tricks etc and someone was kind enough to put all that info into something comprehendable. I'm sure we'd be able to put something together here.

isotopesope

get a track hub. don't waste your time with ghetto rigs.

yes, i am an elitist.

EIKNARF

does a good set usually go for?

edw

https://www.bikeforums.net/singlespeed-fixed-gear/287364-resource-thread-single-speed-fixed-gear-read-first.html

Cynikal 

C'mon guys this was a 4 year old thread.

joetotale

Googling "track hubset" produced this (Formula 32h black track hubset, $65) at the top.

I hear this Google is good for finding out all sorts of information....

edw

woops didn't look at the dates

c0urt

if you are being really cheap. the nashbar rear hub, a shimano deore front hub and a cupoun

baxtefer

zombie thread wants BRAAAAAAAIIIIIIIIIIIINNNNNSSS!

G60

a FAQ would be great, if anybody would put in the time to get one started.

a lot of rattling of sabres going on about a FAQ but nobody wants to step up and put in the work.

jhaber

How do you find this setup with respect to chain alignment. Are both cogs out of true alignment with the chainring? Is one in line and one way out? Loud? Does the chain ever come loose? Sounds like an interesting setup.