If you are looking for a single speed drivetrain for your Downhill or Dirt bike then SB1 is the right choice. Thanks to the very high quality manufacturing process, their components are extremely reliable. You can choose to buy the entire singlespeed set, which includes chain tensioner, sprocket and spacer kit, or each part individually. Whatever your need, SB One Bikeparts are ready to shred on the most difficult descents and bike parks all over the world!