With the E-Thru axle skewer you use an axle skewer to put your mountain bike in the Tacx trainer. These axles are only suitable for the Tacx classic trainers. Separate axles are available for direct drive trainers, and replace the standard axle skewer.
T1707 E-Thru trainer axle M12x1, with metric fine thread - Suitable for hubs with axle skewer attachment 142×12mm: various DT Swiss and Shimano types
T1708 E-Thru trainer axle M12x1.75, with standard threaded cartridge - Suitable for hubs with a Maxle axle skewer attachment 135×12, 142×12, 150×12mm and Trek ABP 142×12.
T1709 E-Thru adapter X-12 (>142 mm) - Suitable for hubs with axle skewer 142×12mm
T1710 E-Thru trainer axle M12x1.5, with medium thread - Suitable for hubs with axle skewer attachment 142×12 including Shimano SM-AX65, SM-AX75, SM-AX76 and SM-AX78
Consult this document with Tacx trainer axle dimensions to find out which axle your mountain bike needs.
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