Fixed gear sprocket – do they screw on?
Want to change the gear on my pompino, so took the lockring off and expected the sprocket to just fall off. It appears to be screwed on, though – it this normal?Posted 3 years ago
Don’t get what the lockring is for in this case – be good to know so I can buy the right replacement cog, if it has to be threaded or if the lockring can just press it on.TiRedMember
Check that you screw it on the correct way round, there is a spacer on one side of many sprockets to move it further from the spokes.
And they can be VERY tight. And of course the lockring is reverse threaded, but you’ve got that off already.
When I had my rear wheel rebuilt, guess who forgot to take the sprocket off before disassembling 😳 . Ever tried removing a sprocket with only a flange to hold? Had to half rebuild and ruined half the spokes in the process!Posted 3 years agotimbaMember
If the lock ring is off and the sprocket is for the bin, try clamping the sprocket teeth between two pieces of wood in a vice so that the wheel is horizontal and the teeth bite into the wood. Turn the wheel like a steering wheel, but only if the sprocket is for the bin, and don’t tighten the vice more than you need to or you’ll bend somethingPosted 3 years agomattsccmMember
Take the lock rings off and go for a ride, trying to lock the back wheel up a lot. Lots of WD40 or plus gas can help. You will have “welded” alloy to steel which isn’t helping.Posted 3 years ago
If things get really bad you could reverse the wheel so that you are pulling the chain against the thread. Then ride it a lot.
Something else will need reversing as well which may be tricky depending on your chainset. 😉 It works thoughepicycloSubscriber
chipster – Member
Try putting the wheel back in the bike and stamping a pedal backwards.
Traditional methods work best.
If it doesn’t, just go for a ride without the lockring and do some skids. It will come loose at an inopportune moment, but it will come loose. 🙂Posted 3 years agobob_summersMember
Why is it shit? Has worked perfectly for me for 30yrs or so! I’ve had more problems with freehub systems…
That said, Miche do a screw on carrier, so you can swap between cogs just by removing the lock ring. The cog just slots on.
I think for the track though, simple=betterPosted 3 years ago
Thanks for the tips – it came off last night ok with some oil, the whip and a couple of bevvies.Posted 3 years ago
Fancy trying a time trial on it (a ten) so need to up the gear inches a wee bit. Does 49×16 (82) sound like the right neighbourhood for a flattish ten? Never done one before.
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