BOLANY Mountain Bike Flywheel 13 Speed 50T Variable Speed Cassette Freewheel for Mountain Road Bike

Feature: 1. Premium Material: Made of chromium molybdenum steel (nickel chromium surface treatment), corrosion resistance, good heat resistance, do not worry about long term use of friction heat to affect its life. 2. Good Features: 13 speed 50T bike freewheel is easy to maintain and rarely rubbed internally. This flywheel is characterized by smooth rotation without noise. 3. Operate Smoothly: High accuracy internal thread, ensure the flywheel is tightly connected with the bicycle hub, and the operation is stable. 4. High Strength: Chromium molybdenum steel material has high rigidity and high strength, and its wear resistance is higher than that of its peers. 5. Better Compatibility: High modeling accuracy, toothless design, suitable for road bike cassette flywheel, suitable for SHIMANO and for SRAM. Specification: Item Type: Mountain Bike Flywheel Product Material: Chromium Molybdenum Steel Color: As Pictures Shown Weight: Approx. 644g 22.7oz Speed: HG System Adaptation: Road Bike Cassette Flywheel Compatibility: for SHIMANO and for RAM (Note: Must be a regular hub). Package List: 1 x Flywheel3 x Accessories