The AX76 12x142mm Thru-Axle is Shimano's skewer for the E-Thru Axle system built into kit like the superlative XTR hubs. If you're looking for a new 12mm skewer for your Shimano rig, we recommend not taking the risk of discovering previously unknown compatibility issues between brand X and the E-Thru design as your rear wheel tumbles out in the middle of a techy rock garden. Run Shimano, and ride with confidence.