Sram Black Box Ceramic Bearing Jockey Wheels XX1 & X0 11T Headsets 1-Freewheel turner for 5 to

1-Freewheel turner for 5 to 10 speed cassettes and freewheels

Tooth range: 50t / 34t

Weather is a non-factor with the water resistant Alterra Jacket

and you'll find some interesting structures

Sram Black Box Ceramic Bearing Jockey Wheels XX1 & X0 11T Headsets 1-Freewheel turner for 5 toSram Black Box Ceramic Bearing Jockey Wheels XX1 & X0 11T The SRAM Black Box ceramic derailleur pulleys are made of the same material as the standard pulleys, but they use polished stainless steel races and ceramic ball bearings in a sealed unit. The pulleys are a bit lighter and more durable thanks to the ceramic balls, but more importantly they have substantially less drag than standard stainless steel balls. And they can be taken out and re lubed