Easily adjustable width: Comes with a variety of thickness spacers for precise width adjustment, ensuring a biketrainer thru axle skewer fit every time. Easy installation: Swap your bike's thruaxle with this adapter for upgraded wear resistance and a sleek appearance; kickstart your indoor training routine with confidence. Durability assured: Made from a resilient alloy, this cycle trainer skewer is wearresistant and sturdy, avoiding deformation or rust for longlasting use. Enhanced compatibility options: Designed for rear axles from 135 mm to 148 mm in width, with three thread pitch choices P1.0, P1.5, P1.75 for seamless biketrainer integration across a broad range of cycle models. Use scenario: You have a road or mountain bike with a rear thruaxle in the 135–148 mm range and a compatible trainer. Use the spacer set to adjust width and select the appropriate thread pitch to secure a stable, dependable mounting. Use scenario: You rotate between multiple bikes with different rearaxle widths. This adapter accommodates 135–148 mm widths and three thread pitches, enabling quick adaptation for each bike model. Use scenario: You train regularly in varying conditions and value durability. The alloy construction provides longlasting wear resistance and rust protection, helping maintain reliable performance over time.