Jockey Wheels

sagefly

A daft question maybe, I need to replace one of the jockey wheels on a 9spd Sora setup.

I cant see the Sora jockey wheels advertised anywhere, is there a generic jockey wheel for the lower end Shimano products or do I just get any old jockey wheel and stick it in?

Any advice appreciated

Many thanks

sagefly

Is it that bad, really?
:oops:

keef66

I didn't reply cos I didn't know the answer. If you look on Shimano Tech docs for the exploded diagram of your mech and make a note of the part number you can then google for it.

I do know the upper and lower jockey wheels are different; you might have to buy them as a pair.

Monty Dog

Jockey wheels come as a pair - if your LBS doesn't have them in stock, expect they can get them in a couple of days. There are aftermarket ones available from Tacx and KCNC prices from a tenner to....depends on how much you like carbon and ceramic bearings?

Wooliferkins

They do come as pairs. BBB Rollerboys are as good as and BDP-02 for Shimano 9X

Will Nunez

sagefly wrote:

Is it that bad, really?
:oops:

Shimano Jockeys do wear out, I made some ninja stars out of mine

sagefly

Guys thanks for the replies.

I take it that Shimano jockey wheels aren't the most durable. The TACX ones look the go

I'll have more stupid questions on other stuff later...................

Feel free to give advice and point out my stupidity!!

Will Nunez

It took 6800 miles to make that ninja star

sagefly

Mine have a way to go before I can sell then to Phantom Agents!!

rolf_f

Wooliferkins wrote:

They do come as pairs. BBB Rollerboys

These are good - well under a tenner (less than the Shimano cheapo jockey wheels that come as standard) irrc and with proper sealed bearings rather than nasty plastic bushes that sieze up.

Will Nunez

Was just pondering if not changing them for 6800 was neglect...And it made me think, do the jockeys actually contribute to chain wear? The chain ring does as it is constantly opposing the force of the cassette, so the chain is in perpetual tension between the cassettte and chainring and as a result chain stretches which then weares the teeth which then stretches chain further etc.

The jockeys on the other hand do not risist the chain at all and are there merely to pick up the slack in the chain. So in effect does that mean jockey wear doesnt necessitate replacement as early as elsewhere? It wasnt the wear of the teeth that forced my change it was the amount of play in the bearings that made me change. Hope you dont see this as a hijack discussion

sagefly

Its all worthwhile, I was wondering why there are teeth on the jockey wheels after all they only tension the chain......

Will Nunez

I suppose you need the teetth for alignment purposes. Top one aligns with cassette boone with chain ring

keef66

The top jockey wheel plays a part in lining up the chain to the sprocket, so when the bearings get worn and the wheel is slopping sideways, the gear changes can suffer.

Presumably the teeth help ensure the precise alignment of chain and jockey wheels to keep the chain central with no rubbing as it passes through the rear mech cage.

rake

as the chain pitch increases with wear i expect it has the same effect onthe jockey wheel, cuasing the star shape.

Pigtail

I have a 9 speed Tiagra rear mech, which has some slight scratches from clipless moments, and have taken off the jockey wheels a couple of times to clean and grease them. The bushes are metal not plastic and it all seems to be working well, they spin very freely - so I'm leaving it alone. However I bought a new rear mech in a sale for less than a tenner, and will swap the whole thing when it needs it.

So depending what your future intentions are for your bike you might be as well changing like for like or upgrading the mech rather than messing about with jockey wheels.