The Tacx thru-axle adapter allows you to secure your mountain bike to the Tacx trainer. These axles are exclusively suitable for the Tacx Classic trainers. For direct drive trainers, special axles are available that replace the standard axle clamping. The Tacx thru-axle adapters are compatible with all home trainers, except for the Neo Smart and the Flux Smart. T1711 M12x1 (E-Thru): suitable for hubs with thru-axle clamping 142 x 12 mm: DT Swiss RWS axle clamping (conical and flat), Syntace X-12 system (Specialized), and various from Shimano.