ATS Shim & Top Cap Size:100 mm measure your steer tube

measure your steer tube

80 mm ATS Shim = 40 mm of adjustability

It is NOT intended to be a Steer tube extender

Remember that the ATS Shim should extend only 2-3 mm above the steer tube

100 mm ATS Shim = 65 mm of adjustability

ATS Shim & Top Cap Size:100 mm measure your steer tubeATS Shims with Top Caps are available to be purchased separately. Choose from either black or silver. We keep two different lengths in stock: 80 mm ATS Shim = 40 mm of adjustability 100 mm ATS Shim = 65 mm of adjustability To find the length you need, measure your steer tube. Remember that the ATS Shim should extend only 2 3 mm above the steer tube. It is NOT intended to be a Steer tube extender.