Shimano Deore XT Quick Release Skewer for Front Hub 100mm & Rear Hub 135mm DEORE / XT Quick Release Skewer, Super-easy to install Front weight: 60g, suitable for front hub: 100mm Rear weight: 65g, suitable for rear hub: 135mm It works perfectly for optimum performance and maximum safety and longevity NOTE: please check your bike whether is suitable before buy