This Tacx E-Thru 10mm axle with 1.0mm metric fine thread replaces the standard trainer axle and accommodates mountain bikes with 135 x 10mm rear axles, and an external frame width of 162.5mm max, such as various Swiss and Shimano types. Please determine your bikes rear axle thread, as Tacx offers various trainer axles with thread ranging from 1mm fine to 1.75mm standard course. Suitable for the following Tacx trainers with rear wheel drive : Genius IRONMAN Bushido Vortex Flow Satori Booster Blue Motion Blue Matic Blue Twist Specifications: Axle Size: 135 x 10mm Thread Size: 10 x 1mm Length: 162.5mm