The 14 bash plates 104mm bcd from hope is designed to replace the outer chainring on your chainset to give you better security and protection in any terrain the bash ring is made from cnc machined from aerospace grade heat treated aluminium for strength and keeping it light the aluminium bash ring takes the place of the large chainring on single or double ring set ups making it ideal for the new breed of 1x10 or 2x10 drivetrains available with a 104mm bcd with a 4 bolt pattern in black onl