Flip the thread on valve to change from Presta to Schrader valves or vice versa

Mounts directly on 31

It'll fit all wheel sizes and also is fantastic for keeping your fork stanctions and seals clean

or attached to your helmet with the included "action camera" style helmet mount

This system ties in perfectly with Spank's 35mm clamp bars

Box Four 8 Speed Wide Range Groupset - Multi Shift - 11-42T - 8 Speed Back in Stock Flip the thread on valveThe Box Four range is for those people who just want less fuss! You're fond of Prime 9, but know 8 is enough, and surely 12 42T is plenty of range for an 8 speed cassette. The Box Four derailleur still has the Limited Slip clutch but now arrives with a more compact cage. The custom 8 speed chain is built for abuse, although it's sophisticated enough to have its own wide narrow chainring. Who's this item for: The multishift option is perfect for riders