AvantGarden

I just bought a used road bike that has a SRAM Red 10 speed rear derailleur:

1. Lower pulley (with a thick axis screw) is actually a Shimano ceramic bearing pulley and it is in mint condition inside. Is that Ok to have a Shimano pulley ?
2. How are ceramic bearings lubricated ? Is high quality bike grease good enough ?
3. Upper pulley (with a thin axis screw) is destroyed.
Can anyone please link to its part number, drawing or shop link ?

AvantGarden

I have a 10 speed SRAM red system.
I noticed listings for 10 speed SRAM pulleys do not include the red group set as relevant.
Is that intentional ? Is there a specific set of pulleys for red Derailleur ?

https://www.amazon.com/SRAM-Deraille.../dp/B001CJX6D6

AvantGarden

This one is intender for SRAM RED derailleur but it says 12 speed where as I have SRAM RED derailleur with a 10 speed cassette
https://r2-bike.com/SRAM-Pulley-Set-...Force-eTap-AXS

Duragrouch

I don't know the answer, but if you have to pay premium price for any pulleys, look for ones with sealed ball bearings instead of bushings, if available. You might look online for that, and the maker or seller may know exactly what pulley will fit for you. Oh looky here, quick search on amazon, don't know if they fit yours, but cheap:

https://www.amazon.com/Stylrtop-Alum...dp/B01F5P9RMQ/

KerryIrons

If the pulley spins easily, it probably work fine. No special lube needed for ceramic bearings. For derailleur pulleys, I use heavy oil rather than grease. If the grease is stiff enough if might cause the chain to skip over the plastic teeth on the pulley and thus damage the pulley.

hounslow

Sealed bearings in pulleys aren't necessary, aluminium ones are absolutely terrible and often lead to poor performance and extra noise. OP, buy the right SRAM ones if you need to otherwise if the Shimano ones work keep them.