- Easily adjustable width: Includes a variety of thickness spacers for precise width adjustment, ensuring a perfect bike-trainer thru-axle skewer fit every time. - Easy install: Remove your bike's existing thru-axle and replace it with this adapter. Adds a stylish look and improves wear resistance; ready for indoor training with no special tools or expertise required. - Strength in every ride: Constructed from high-quality alloy for sturdy durability and longevity. Wear-resistant with no deformation or rust for enduring performance. - Optimized indoor cycling setup: Three thread pitch options (P1.0, P1.5, P1.75) for rear axles from 135mm to 148mm, enabling compatibility with different bike models and trainers and facilitating easy integration. - Use scenarios: - You have a trainer that requires a different axle width; adjust with spacers to achieve a proper fit. - You switch between bikes with rear spacings from 135mm to 148mm; this adapter covers all common sizes for quick indoor training setup. - You replace a worn or rusted stock thru-axle to extend life and maintain performance during indoor workouts.