- Perfect fit with spacer set: The included spacers allow easy width adjustment for a precise pairing of your bike and trainer, delivering stable, optimal performance during indoor training. - Easy to mount: Upgrade your bike by replacing the existing thru-axle with this adapter. It offers enhanced durability and a sleek appearance, enabling quick and reliable indoor training setup. - Strength and longevity: Made from high-quality alloy, this cycle trainer skewer provides strong, wear-resistant performance with no deformation or rust, for lasting reliability. - Broad compatibility: Designed for rear axles from 135 mm to 148 mm in width, with three thread pitch options—P1.0, P1.5, P1.75—for seamless bike-trainer integration across a wide range of cycle models. - Use scenarios: - You have multiple bikes with different rear axle widths and want to use a single trainer with quick, tool-light swaps. - You regularly convert bikes to indoor training and need a dependable, easy-to-install adapter that fits a variety of models. - You train in humid or sweat-prone environments and require durable alloy construction that resists wear and rust over time.