Roulement de Direction BLACK BEARING B4 30.15x39x6.5mm 45/45° 1-1/8" Lot Their ergonomic structure promotes a

Their ergonomic structure promotes a precise and comfortable fit on long rides

The ULTEGRA CS-R8101 cassette is the ultimate in shifting for road cycling

Ensuring optimal power transfer

conçue en Californie pour allier style et performance

Designed for tubeless

Roulement de Direction BLACK BEARING B4 30.15x39x6.5mm 45/45° 1-1/8" Lot Their ergonomic structure promotes aThe BLACK BEARING 1 1 8" 45 45 headset bearing (30. 15 x 39 x 6. 5 mm) is a replacement model of equivalent quality to the models originally fitted most of the time on your bike. This bearing consists of angular contact chrome steel balls, a cage also made of chrome steel, and specific seals for headsets.