When the mud is at it’s thickest; when the air is choked with dust; when it seems like the rain will never stop, your BBB DriveTrain cassette will keep you going. BBB cassettes are designed tough and are well know for durability, reliability, and ease of use. BBB Cassettes are available in a wide range of gear ratios for both road and mountain bikes (S is Shimano / Sram compatible, C is Campagnolo compatible).