1. INDOOR BIKE TRAINER Whether it's a typhoon or a sunny day, you can stay in shape with your own bike. Our bike trainer avoids the sudden wind and rain that occurs during outdoor training. 2. ADJUSTABLE WHEELBASE The front wheel mount is adjustable on the trainer. It is available in seven different intervals and is compatible with even more models. Suitable for 24 29 inch mountain bikes and 700C road bikes. 3. MATERIALS Our bike roller trainer is made of quality aluminum alloy and ABS plastic. It runs smoothly and reduces noise when using the roller driving platform. It is recommended to use sports mats and smooth tires. Please note that bicycle tires cannot be completely silent when turning. 4. SYMMETRICAL TAPER BEARINGS Tapered symmetrical rollers work with lower friction and minimal kinetic energy loss, recreating a real riding experience while reducing bicycle tire wear. Ensures your balance and safety.