The FH-M8110 is a rear FREEHUB for a disc break from Shimano’s Deore XT range. It is easy to install with the spline mount & lock ring. The FH-M78110 has a 12 mm E-THRU axel. In turn the FH-M8110 increase acceleration increasing riding excitement, enjoyment & performance. The measurements are 142mm X 12mm & is available in 28H, 32H.