Wolf Tooth MK0 Headset - IS42/28.6 Upper 4mm Stack Shadow Gray Model=XT RD-M8000 Rear Derailleur Shimano ST-RX400-R GRX 10 speed

Shimano ST-RX400-R GRX 10 speed shift levers use a different cable pull than Shimano's 10 speed road shift levers

The new design of the mechanical components ensures fluid efficient reliable shifting

8mm Clamp +/-0 Silver

Alleviates hand pain

Wolf Tooth MK0 Headset - IS42/28.6 Upper 4mm Stack Shadow Gray Model=XT RD-M8000 Rear Derailleur Shimano ST-RX400-R GRX 10 speedMK0 items represent a refined approach to component engineering with special consultation with Team Visma Lease A Bike. Each top cap spends 4x more time in Wolf Tooth's CNC lathe before undergoing thorough QC inspection and anodizing in the new Shadow Gray color. The extra machining and new profile of the MK0 upper headsets have meaningful gains and result in a 44% reduction in aluminum weight without compromising strength and durability. These super