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For use with four- and five-bolt chainring patterns, this highly accurate gauge measures in millimeters for the most precise reading. The piloted tips on each of the tools arms are inserted into the chainring holes, chainring bolts or crank holes, measuring the distance between the two points to determine the exact chainring size for your specific frame.
The measurements are read on a laser engraved scale on the anodized aluminum gauge face, with additional pattern measurements referenced on the included mounting pattern chart. A convenient tool to use when thinking of replacing your chainring, the Chainring Diameter Gauge CDG-2 is a brilliant precision workshop tool from Park Tool.
We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.
Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.