Bearing of a derailleur pulley

[Sander23]

1 of the bearing of my sram ex1 derailleur seems to be broken. Is it possible toch change the bearing on itself? The theeth of the pulleywheels are still in great condition.

If so wich one do I need?

 

[Jackware]

looking at the Sram spares site they don't appear to be a spare part. Probably easier to buy a a new pulley set.

BikeInn show them in stock;

Sram Boîte Intérieure/rouleaux EX1, Noir | Bikeinn

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[Ted]

You could try removing the dust caps from the jockey wheel, pulling the bearing seals, cleaning out the bearing, repacking with grease, and putting the seals back on. It is easy and worked for me.

 

[RickBullotta]

There's a good chance that any X-SYNC 14 tooth pulley wheels would work, including aftermarket ones.

 

[Sander23]

There's a good chance that any X-SYNC 14 tooth pulley wheels would work, including aftermarket ones.

Indeed on the Cage is written x-actualisation and the pulley itself seems xsync with 14 thooth.
So I can use other ones then?

 

[Sander23]

You could try removing the dust caps from the jockey wheel, pulling the bearing seals, cleaning out the bearing, repacking with grease, and putting the seals back on. It is easy and worked for me.

I doubt it will work, there is so much movement between the pulley and the bearing

 

[Sander23]

This is the pulley. Seems done or is it still ok the bearing on it own( if I can find it)?

 

[RustyIron]

There is obviously a lot of wear on the side of the pulley wheel. There's a washer-like dust cap that should go there. Was the pulley installed with both washers? Maybe the washer was missing, or maybe muck just got in there and started grinding away. Regardless of the condition of the bearing, I'd replace the whole set.

 

[Sander23]

Do I have an alternative to the original? I have no clue is 8 and 12 speed is the same or different?

 

[Bones]

Superstar make some cnc jockey wheels with replaceable bearings for about £25

 

[Sander23]

Yeah but are the jockey wheels of an 8 sp and an 11-12 sp the same ?

 

[Kliman]

These jockey wheels look the same as my 11s gx. In any event, the bearing spec is in your photo - 626 LLU. Here’s one link -

Bearings Online

Buy 626 2RS Deep Groove Ball Bearing 6x19x6 online today at Bearings Online! We stock a range of quality bearings and transmission products by premium brands.

www.bearings-online.co.uk

The bearing will push out of the plastic wheel easily with care.
I’ve done it more than once.

 

[Sander23]

But is the wheel itself still good? The thooth are almost new, the site of the wheel seems like it been works

 

[Kliman]

They look good enough to punt a few quid on some cheap bearings, considering the alternatives. Amazon might do them cheaper. Their use and location kind of renders these bearings kind of sacrificial, you can’t keep the grit and sh*t out!

 

[KennyB]

Sockets are good for pressing them in and out of they are stiff

 

[Loe Rider]

I use stainless steel bearings when I replace mine as they last as long as the jockey wheel then.

 

[James_C]

these are worth keeping an eye on. If the seize, it can smash up the whole mech, as happened to me.

I check regularly and replace bearings when they get gritty now. About 6 weeks apart last time :-O

I buy the bearings 10 at a time. I personally wouldnt use cheap ones, you want decent seals, although im not sure how much difference it actually makes.