Singlespeed & Fixed Gear - lockring gap
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
So I have a noname flip-flop hub that was miraculously already on the bike I got for free from a friend's basement. I'm running it single-speed for now, but on the side with the two sets of threads I've got a track cog & a lockring on it. My problem is this: with the cog threaded all the way against the hub and the lockring threaded all the way to where the threads for the cog begin, there's still a 1-2mm gap between the two. I've torqued the lockring as much as I can (and the gap seems to be on the threads that the gear's on) and am wary of flipping the wheel & riding until there's no gap there any more, as I value not busting my ass. Any suggestions, short of Loctiting the thing on there or something?
you can use a bottom bracket spacer (you can get ones as small as 1-2mm) to push out the cog to where the lock ring meets. they are cheap.
Ah, ok.. I didn't realize that a BB spacer would fit on there. Works for me, though if you see me barreling down High St. screaming, you can assume I screwed something up.
08-21-05, 08:29 PM
What happens if you flip the cog around and thread it on, followed by the lockring?
A BB lockring should work too, in case availability between BB lockring/spacer is an issue. That's what people thread on after the cog in a "bumbike" setup, just put it on inside the cog instead of outside.
08-22-05, 01:33 AM
I rode that way for a while. I threaded on a BB lockring, then the cog, then the lockring. Worked nicely! Just make sure you get each stage on tight before putting on the next one, a lockring isn't a substitute for properly tightened cogs.
I'm still having difficulty understanding why we still use threaded junctions for rotating parts. I think bikes are the only place this odd practice still happens, every other industry gave it up years ago.. :(
I did try putting the cog on the other way, but same thing -- it's just not as wide as the threads are on that hub. I might try a BB lockring too, we'll see what I can dig up as far as spacers go. Thanks for the suggestions, all.
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.