Hammaspyörä Sturmey-Archer 3/32" flat

Rear hub sprocketTeeth (Optional): 15T OR 17T OR 20T OR 21T OR 22TFits chain size: 1/2 x 3/32"Flat3 notchWeight: 30 g (15T)Can be used with single speed or with internal gear systemPlease make sure your chain is correct size (1/2 x 3/32")Important: 15T and 17T versions do not have holes as in photo.