Box Two Prime 9 Speed X-Wide Groupset - Multi Shift - 11-50T - 9 Speed Replace Images This new design has a

This new design has a lower profile than most skate and BMX style helmets and is curved in more at the back and sides

The air underneath the tread patch and the CushCore insert next to the rim

With Blackburn's AnyValve pump head you don't need to fuss around with switching out the grommets

Lower Leg Bypass Channels: Helps alleviate excessive pressure ramping at end stroke by dramatically increasing air volume within the lower legs

Fits most adult bikes

Box Two Prime 9 Speed X-Wide Groupset - Multi Shift - 11-50T - 9 Speed Replace Images This new design has aThe Prime 9 range of components from Box has made many people rethink what a 9 speed drivetrain is capable of. Box Two is their most durable drivetrain that offers excellent performance, durability, and a competitive weight at a wallet friendly price point. Who's this item for: This is for riders looking for all the same range as a 12 speed setup with the simplicity and weight savings of a 9 speed setup. 9 speeds are great for All Mountain style