- Easily adjustable: Comes with a variety of thickness spacers for easy width adjustment, ensuring a perfect bike-trainer thru axle skewer fit every time. - Easy to mount: Upgrade your bike by replacing the existing thru-axle with this adapter. It offers enhanced durability, a sleek appearance, and quick indoor training setup. - Durable alloy construction: Alloy material resists wear and rust, delivering long lasting durability and sturdiness. - Wide compatibility and performance: Three thread pitch options P1.0, P1.5, P1.75 and suitable for 135-148 mm rear axles, ensuring seamless bike-trainer connection across a wide range of bike models. Use scenarios - Scenario 1: You have road, gravel, or MTB bikes with rear spacing from 135 to 148 mm and want to switch between bikes on the same trainer with a secure fit. - Scenario 2: You train indoors frequently and need quick, tool-free adaptation when using different bikes or trainer setups by selecting the appropriate thread pitch and spacers. - Scenario 3: You are upgrading an older or new bike to be trainer compatible, benefiting from durable alloy construction and rust resistance for long term use.