Which rear mech?

tubthumped

My Shimano Alivio rear mech is at the end of it's life, theres more free-play in every direction than you'd care to imagine, the jockey wheels are dead and it's just not coping with life very well.

Looking on the 'bay to find a replacment I'm just wondering what I can replace with. It's an 8 speed back end, are all the 7/8/9 speed rear mech's the same?

How about something like this with a set of new jockey wheels in?

http://www.ebay.co.uk/itm/Shimano-Rear-Derailleur-Deore-SLX-long-cage-8-9-speed-/170757178054?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item27c1ebc2c6#ht_500wt_1204


Cheers!

cooldad

That looks nasty, and decent new jockey wheels will cost you £10 plus for a set. (Note his link to Wiggle, they don't actually have both in stock)(it's also not an SLX, it's an LX)
If the Alivio was ok for you then this
http://www.ebay.co.uk/itm/Shimano-Alivi ... 43ac3da42d

Nice new Deore for the same price as the old one plus new jockeys
http://www.ebay.co.uk/itm/New-Shimano-D ... 2c5bc9abcc

Or a bargain new LX (although I can't see a guide wheel - you may want to ask)
http://www.ebay.co.uk/itm/Shimano-Rear- ... 33702501cf

Greer_

tubthumped wrote:

Looking on the 'bay to find a replacment I'm just wondering what I can replace with. It's an 8 speed back end, are all the 7/8/9 speed rear mech's the same?

If your bike is currently an 8-speed, it means it has an 8-speed cassette. This has to match the mech so an 8-speed mech would be needed unless you're planning on changing the cassette. And I'm assuming you have shimano shifters so a shimano rear mech is needed.

cooldad

Greer_ wrote:

tubthumped wrote:

Looking on the 'bay to find a replacment I'm just wondering what I can replace with. It's an 8 speed back end, are all the 7/8/9 speed rear mech's the same?

If your bike is currently an 8-speed, it means it has an 8-speed cassette. This has to match the mech so an 8-speed mech would be needed unless you're planning on changing the cassette. And I'm assuming you have shimano shifters so a shimano rear mech is needed.

Rubbish. 7, 8 and 9 speed mechs will all work. They all have the same pull ratio. Shift depends on shifter. And he already said he has a Shimano mech. So existing shifter and cassette will be fine.
Only thing that has to be adequate is the total capacity, but a long cage will work for all.