SRAM 900 Rear Hub - QR x 135mm/12 x 142mm 6-Bolt HG 11 Road Black 32H MFPN=BAA0090K While the smaller woom 1

While the smaller woom 1 is designed for kid’s as young as 18 months

Special air channels in the lightweight wood types reduce weight compared to the Air Channel construction

Designed for use with SRAM Boost cranksets with 55mm chainlines

Color Black Bag Dimensions in inches 25

Vision is equipped with a Hydro Lens Tech lens

SRAM 900 Rear Hub - QR x 135mm/12 x 142mm 6-Bolt HG 11 Road Black 32H MFPN=BAA0090K While the smaller woom 1SRAM 900 Rear Hub QR x 135mm 12 x 142mm 6 Bolt HG 11 Road Black 32H. 900 Rear HubSealed cartridge bearings Angled flanges provide optimum spoke geometry Axle end caps for alternate frame specs are included (except for Boost hubs) and can be swapped without tools TECH SPECS Color Black Flange Diameter Left 58 Skewer Included Yes Rear Axle QR x 135mm Rear Axle 12mm Thru x 142mm Flange Diameter Right 60 Cassette Body Type Shimano SRAM 11 Speed Road