The Tacx Trainer E-Thru Skewers are only suitable for the Tacx classic trainers. Separate axles are available for direct drive trainers, and replace the standard axle skewer.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.
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