Shimano Alfine SG-S501 Premium 8 Speed internal gear hub, laced into Sun CR18 rim (Presta drilled) 36 DT Competition double-butted stainless steel spokes.Hub comes with 21t sprocket and one set of non-turn washers (blue/green). If your bike has different dropouts, order them from the Related Items, below.Silver hub. Satin finished silver rimShifter sold separately.132 mm rear axle spacing may require spreading the frame of older model bikes..Don't forget rim tape. Check the Related Items, below.
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