Easily adjustable width: Includes a variety of thickness spacers to set the correct width, ensuring a precise biketrainer thruaxle skewer fit every time. Easy installation: Remove your bike's existing thruaxle and it with this adapter. Adds a stylish look and improves wear resistance; no special tools or expertise required. Reliable and durable: Made of tough alloy material, this cycle trainer skewer is sturdy, wear resistant, and built to last without deformation or rust. Seamless indoor training setup: Available in three thread pitch options P1.0, P1.5, P1.75 and designed to fit rear axles from 135 mm to 148 mm, ensuring wide compatibility and easy integration with various bike models and trainers. Use scenarios: You own multiple bikes with different rearaxle widths and want a single, easy indoor training setup. You frequently switch bikes or borrow bikes for indoor training and need quick, tool installation. You want a durable upgrade for a worn or rusted original skewer to improve longevity and reliability.