Zipp CeramicSpeed 177 Freehub Freehub Body Campagnolo 11/12 00.1918.183.008 ModelNumber=D1517 These rings fit any SRAM

These rings fit any SRAM mountain bike crankset with a 94 BCD

(The woom 2 ships with a coaster brake as per CPSC requirement)

If you have a BB30 crankset (30mm diameter aluminum spindle) this measurement will determine whether it is a long or short spindle:

Offset of pump bracket mounting holes allows mounting mini pumps on most mountain bikes (brackets for many pumps do not clear the frame on mountain bikes)

Durable Cordura Nylon for extra abrasion resistance

Zipp CeramicSpeed 177 Freehub Freehub Body Campagnolo 11/12 00.1918.183.008 ModelNumber=D1517 These rings fit any SRAMLowest resistance hybrid ceramic (ceramic balls and steel cages) available Measurable wattage savings between 1. 5 and 9 watts per bearing set, depending on the level and condition of your existing bearings Kits include Freehub body with CeramicSpeed bearings pre installed for easy installation onto the wheel SRAM Model ID: HU SPP A0 TECH SPECS Freehub Compatibility 177 Freehub Body Campagnolo Speed 11 12