Patent ID: 7959529
Filing Date: 2011-06-14
Classification: B62M

Abstract:
1. A bicycle multi-gear cassette mountable to a wheel hub, the cassette comprising: a truncated conical shell including: a plurality of toothed sprockets having different numbers of teeth disposed on the shell and extending radially of the axis, at least one of the plurality of toothed sprockets and the shell including a recess on a side of the at least one of the plurality of toothed sprockets and the shell facing an adjacent toothed sprocket having a smaller number of teeth, the recess including a first region having a first depth and a second region having a second depth, the first depth greater than the second depth, the first region disposed on the sprocket, the second region disposed on the shell adjacent the sprocket, the shell and the plurality of toothed sprockets being a single-piece construction.