Bbb aluboys ceramic jockey wheels
Bbb aluboys ceramic jockey wheelsreplacement high quality aluminium derailleur pulleys with ceramic bearings features extra stiff for fast shifting high quality sealed ceramic bearing super smooth and durable 11t compatible with shimano 9 10 and 11 speed except rd 7900 and 7970 and campagnolo 11 speedbuybbb componentsfrom chain reaction cycles the worlds largest online bike store