BUCKLOS Bicycle Chains are made of high-hardness steel and are electroplated to effectively prevent corrosion and rust.The surface of the bike chain is finely lubricated to ensure smooth and easy shifting every time.Convenient installation and maintenance. BUCKLOS derailleur chains are 100% compatible with all major systems. We don't distiguish between disciplines; Our chains are suitable for both road and off-road.The way that BUCKLOS chains are categorized makes sense: for example, a product of the BC11 series will use any 11-speed derailleur system and every possible. Chain:.