fit and adjustable width: The included spacers provide easy width adjustment to achieve a precise match between your bike and trainer for performance. Simple mounting process: the existing thruaxle with this adapter to upgrade your setup quickly. It contributes a clean appearance and supports easy indoor training initiation. Strong and durable: Made from alloy, this cycle trainer skewer offers robust strength and longevity. It resists wear, maintains shape, and resists rust for long term use. Broad compatibility: Designed for rear axles from 135 mm to 148 mm in width, with three thread pitches P1.0, P1.5, and P1.75 to fit a wide range of bike models. Practical use scenarios: 1) Indoor trainer workouts on road or hybrid bikes, with a secure, precise fit. 2) Quick transitions between bikes that have different rear hub widths within 135–148 mm. 3) Home gym setup where a single adapter handles multiple bikes for frequent trainer sessions.