SRAM 900 Front 6 Bolt Hub Whether the goal is a finish line, epic adventure or simply getting back home again, our new 900 hubs are ready for the challenge. They're a smooth, consistent and reliable centerpieces to your wheels. SPEEDBALL bearings provide smooth, long-lasting rotation performance. Multiple spoke-count and interchangeable, tool-free end caps make the 900 hubs a perfect choice for any disc-equipped road, gravel, cyclocross, cross country, trail, or enduro bike. Features 32 Hole 15 X 110 Boost spacing 6 Bolt Disc ready SRAM SPEEDBALL bearings | Sram | 900 Front 6 Bolt Hub 15 X 110Mm Boost 28H