Wiki Bicycle » SRAM » S40 Wheelset
Information from: http://www.sram.com/sram/road/products/s40-wheelset.

Climb, accelerate, and sprint with no effort with the lightest of our carbon wheels. The unidirectional carbon fiber used on the structural rim reduces weight while increasing stiffness. Whether using S40s for your local group ride, or on a cyclosportive, their aero shape will always give you the edge.
Material: UD Carbon
Type: Clincher
Spoke Count: 18 (front), 20 (rear)
Weight: 760g (font), 950g (rear)
Depth: 38mm
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