Key benefits Adjustable length with spacers supports thru axle hubs from 135 mm to 148 mm and fits bike frames up to 176 mm wide, enabling versatile compatibility across common trainer setups. Stable training experience with tapered heads on both ends that secure into most trainer mounting holes, reducing slippage during rides. Durable, lightweight construction from 6061 aluminum alloy designed for long use without compromising strength. Enhanced frame protection through tailored spacers that snugly match dropout shapes, helping prevent frame damage during intense sessions. Specifications and features Hub compatibility: 135 mm to 148 mm thru axle Frame width compatibility: up to 176 mm Material: 6061 aluminum alloy End design: tapered heads on both ends for secure mounting Protection: spacers designed to fit dropout contours and cushion the frame during training Use scenarios Quick bike swaps for home training: suitable for road and mountain bikes with thruaxle hubs in the 135–148 mm range and frames up to 176 mm wide, allowing fast setup on most trainers. intensity interval training: tapered heads provide a secure fit while the tailored spacers protect the frame from dropout contact during hard efforts. Multibike training environments: easily adjust between bikes and trainer models without changing the axle, thanks to adjustable length via spacers and robust 6061 aluminum construction.