SRAM 11-Speed, 12T Enduro Zero Ceramic Jockey Wheels, Pulleys XX-1, Force 1,

Description

Enduro derailleur jockey wheels are CNC machined Delrin with Enduro Zero Ceramic bearings, Grade 5 Japanese balls, and CNC machined aluminum bearing covers, all made in the USA. The machined Delrin jockey will outlast any other on the market, especially compared to molded plastic. Much quieter than machined aluminum type, Delrin is the best material for a crisp shift and quiet running.  Rear derailleur jockeys spin 3 times faster than your BB making the ZERO ceramic bearings all the more critical for speed.  The smooth action and stiffer pulley also increases shifting performance and reduces overall drivetrain wear. These rear derailleur jockey sets work with XX1, XO1, X1, and CX1, Force 1, and Rival 1 SRAM derailleurs and contain Grade 3 ZERO Ceramic sealed cartridge bearings with Cryogenic Treated Chromium races, and low drag silicon seals. 5 mm bolt upper and lower, backside relieved on the upper pulley for 6.5 mm.  26.3 grams set.
Seems clear, but these are NOT for 12-Speed.
*CNC Machined in the USA from solid Delrin, these pulleys are much quieter, lower friction and longer lasting than aluminum types. Delrin is a very slippery and quiet material paired with a metal chain, yet very durable and much better than injection molded soft plastic types.
*These have high quality Enduro ceramic hybrid bearings installed with Japanese Grade 5 ceramic balls and dual lip seals to keep the dirt out.
This is for 1 pair of Jockey Wheels, upper and lower.
*CNC machined caps also press in to protect the bearings (see photos to detail).
*These are 8.25 mm wide. They are 12 teeth and there is a specific upper and lower version,  made this way for better shifting. The bottom jockey wheel has an arrow for the spin direction as they are are relieved for lower friction and quieter operation.