Box Four 8S Wide Compact Multi Shift Groupset DH The Box Three Rear Derailleur

The Box Three Rear Derailleur simplifies the features found on the Prime 9 Box One and Two rear derailleurs making for a fully featured wallet friendly rear derailleur

You like to get up there where the air is thin and the details matter

The Box Two E-Bike Cassette differentiates itself from its non-e-bike sibling by offering the high gears with more teeth to withstand the rigors of modern E-Bike riding

You're fond of Prime 9

Your thumb will push a textured die-cast lever on a shifter that's had its hinged clamp whittled away by our CNC machines

Box Four 8S Wide Compact Multi Shift Groupset DH The Box Three Rear DerailleurOur Box Four tier is for those people who just want less fuss! You're fond of Prime 9, but know 8 is enough, and surely 11 42T is plenty of range for an 8 speed cassette. Our 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. Push through fewer gears with a no nonsense shifter. This one is our