Removing that bloody sprocket

Ive tried brute force at the expense of a part tool chain whip literally exploding and the resulting grumpyness of our mechanic...

I've also seen that thing being done where you use the chain itself to get the sprocket off by taking it off the chainring and wrapping it around the cog etc but that looks lke it could end badly for the bike.

Anyone out there know a good/harmless way of removing 'em?

Its a miche hub about 18 months old and I used copper grease on the threads etc, its just really stuck on there.

charrs.

remove the lockring ;)

remove wheel, wrap an old bit of chain around cog, clamp hard in a vice, turn the whole wheel

htfu

^^ + get dt to do it for you. worked for me! ;)

Use your teeth.

Use penetrant spray, not just WD40.

sounds like the lokckring is still on

Use penetrant spray, not just WD40.

I've tried both, the reception was lukewarm at best.

It sting the penis slightly too.

Remove lockring, put it back in the bike, bomb down the road and kick back like a donkey..

"Remove lockring, put it back in the bike, bomb down the road and kick back like a donkey.."

Been doing that for a couple of days.... I'll try the bit of chain in the vice trick now...

If you don't hear anything...

vice
clamp the cog and turn the wheel right out near the edges / holding rim ... huge leverage / much more torque
heat cog with blow torch different metals expand at different rates
just pray the the hub doesn't expand faster than the cog otherwise it'll just tighten even more !! DOH !

put chainwhip on and rest against door frame and use wheel as the lever

rotafix in reverse. works a treat.

http://204.73.203.34/fisso/eng/schpignone.htm

eat three shredded wheat
and try again

vice
clamp the cog and turn the wheel right out near the edges / holding rim ... huge leverage / much more torque
heat cog with blow torch different metals expand at different rates
just pray the the hub doesn't expand faster than the cog otherwise it'll just tighten even more !! DOH !

Coefficient of thermal expansion for aluminium is higher than steel, so if you heat up the cog, the heat transfers to the hub and it expands more than the cog so tightening it. The only benefit heating has is you need to break down the loctite used on the cog if you have a Fuji Track!

As previously suggested, wrap a chain round the cog, hold in a large vice and turn the rim. It will come off. If you're happy to sacrifice the cog, you can beat it off with a hammer and chisel. Both methods work, I've tested them!

don't waste a cog...."unrotafix" it.. put a rag around the bb so the chain does not chip the paint and job done!

You're doing it the wrong way around. I would suggest removing the bicycle from the sprocket.

Ask Chuck Norris to do it for you.

Ask Chuck Berry to sing a song to it

Ask the Chuckle Bros. They can turn their hand to anything!

kill it with fire

Buy a new wheel

buy a new bike

use your best friend Mr,

always works a treat with anything or anyone :)