BBB Rollerboys Jockey Wheels - 12T-14T SRAM 12 Speed MTB

The BBB Rollerboys Jockey Wheels are made from composite material provided by EMS Swiss, with 40% glass-fiber mixture. A complete set of bushings for different shifting systems is included.Options:10T - Compatible with Shimano 7 and 8-speed; Campagnolo 8, 9 and 10 speed; SRAM 9.0('97/'98), 9.0SL('98), 7.0('97/'98) and 5.0('98/'99).11T - Compatible with Shimano 9, 10 and 11-speed / Mega Range and Campagnolo 11 speed11T SRAM - Compatible with the following SRAM systems: 9.0SL ('01/'02), 9.0 ('03), X.9 ('04), X.O, Force and Rival.12T - Compatible with SRAM