Specifications: Band BIKIGHTMaterial Chroming Stainless Steel Gear 6-speed;7-speed;8-speed;9-speed;10-speed Number of Sprockets 6-speed:14/16/18/21/24/28T;7-speed:13/15/17/19/21/24/28T;8-speed:13/14/15/17/19/21/24/28T;9-speed:13/14/15/17/19/21/24/28/32T;10-speed:11/13/15/17/19/21/24/28/32/36T; Color Sliver
Features: Chroming surface & stainless steel, durable & tough. Different speed meets your different needs. Tips: If you have used yourbicycle chain for a long time, suggest that dont replace the new flywheel. Because it will cause a chain jamming & affect yournormal riding. Or, here are two solutions. Solution 1: Replace both the old chain & old flywheel. Solution 2: Underthe circumstance of chain jamming, let them go running-in by force, but it takes time, which depends on wear degree of your chain. Package Including:1 Flywheel