Fit and width adjustment: The included spacers allow easy width tuning to precisely pair your bike with the trainer for optimum performance. Easy to Mount: your bike's existing thruaxle with this adapter to upgrade for trainer use. It offers enhanced durability, a sleek appearance, and quick indoor training initiation. Durable and reliable: Made from quality alloy, this cycle trainer skewer delivers strong, wearresistant performance with no deformation or rust for lasting use. Wide compatibility and seamless setup: Available in three thread pitch options—P1.0, P1.5, and P1.75—and designed to fit rear axles from 135 mm to 148 mm, ensuring broad compatibility with various bike models and trainers. Use scenario: You own a road bike with a thruaxle and a trainer that requires a different mounting interface; install this adapter with spacers to achieve a secure, precise fit and start training quickly. Use scenario: You ride multiple bikes with different rearaxle widths (135–148 mm). Swap adapters and spacers to fit each bike, enabling easy, fast setup across bikes. Use scenario: You frequently train indoors with different trainers. The adapter's durable alloy build and adjustable spacers ensure a stable, rust connection that supports consistent indoor workouts.