1. Aluminum alloy material: The main body of the bicycle flywheel is made of aluminum alloy, which is sturdy and durable, not easy to corrode and rust, with high strength and long service life. 2. Exquisite workmanship: The main body of the mountain bike flywheel adopts excellent manufacturing technology, and the surface is finely polished to ensure strength and improve fastening reliability. 3. Portable replacement: The main body of the road bike flywheel is rust-proof, lightweight, small in size, and easy to carry. It is a DIY replacement part for bicycles. 4. Easy to install: The main body of the bicycle flywheel adopts a small size design, allowing you to easily install and disassemble, saving your time and energy. 5. Scope of application: The mountain bike cassette sprocket tower seat is suitable for outer diameter 44mm/7 inches, height 7.1mm/0.3 inches, 36 teeth, 72 teeth, supports 11 speed, 8-10 speed, and requires 85mm washers.