Measure the diameter (distance across the tube, not around) of the tube to work out the size. Measurement needs to be taken from the inside edge of the inside of the tube.
Please note these do not come with chain-chain purchase separately.
It is easier to match the right part to the repair, so we recommend that you either email us a photo of the part or bring it in. It is likely that we can provide a substitute part if we can’t match the damaged one exactly, which will do the job just as well.