Enhanced integration flexibility: Three thread pitch options P1.0, P1.5, and P1.75 and compatibility with rear axles 135 148 mm width allow easy connection of your bike to any indoor trainer for a variety of training sessions. Gift for him: Suitable for your father, boyfriend, uncle, or neighbor; a thoughtful choice for birthdays, holidays, Christmas, or Year. Adjustable width: Adapts to different rear axle widths with included spacers of varying thicknesses for effortless and precise width adjustment, ensuring a seamless bike to trainer match. Durability and material: Alloy construction provides resistance to wear and rust, offering long lasting durability and sturdiness. Use case 1: Set up a road bike on a compatible indoor trainer for structured interval or endurance training at home. Use case 2: Households with multiple bikes can quickly switch between bikes by adding or removing spacers to fit 135 148 mm axles. Use case 3: Travel or gym environments where different bikes are used; fast installation reduces downtime between riders or workouts.