Wolfgo Freewheel-Bicycle Freewheel Cassette Sprocket 7 Speed Mountain Bike Replacement Accessory

Features: Bike Cassette 7 Speed is 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. Bicycle Freewheel can promise smooth rotation of chain without much noise . Bike Cassette can provid fast riding speed with less effort needed. Cassette flywheel is 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