The shimano xtr m9010 centre lock rear hub is the ultimate in reliable lightweight hubs from the ultimate shimano mtb groupset xtr disc hubs are engineered to perform in the most demanding conditions titanium freehub body with quick pawl engagement 10 degrees provides perfect traction and instant power transfer and ball bearing races are ground with cubic boron nitride tool for high precision durability and smooth rolling the internals feature wide bearing placement gives excellent lateral