Bicycle Freewheel Cassette Sprocket 7 Speed Mountain Bike Replacement Accessory

Features: Constructed of high strength steel, anti rust, non deformation, wear resistant, high performance of durability. High precision thread ensures close connection with the bike hub and smooth operation. It can promise smooth rotation of chain without much noise . Providing fast riding speed with less effort needed. Reliable to use, applicable to mountain bike freewheel. Specification: Material: Stainless steel Weight: 430g 15.2oz Variable speed: 7 speed Size: 11.5 * 11.5cm 4.5 * 4.5in Package List: 1 x Bike Freewheel Set . Note: