Tire Size Chart For Bicycle Rim

Here is a chart of the road tire size that we recommend for various internal rim width. If your tire is not wide enough, you’re risking pinch flats and rim damage. If your tire is too wide, tire burping and poor stability are disturbing.

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ERD Calculate

ERD: Effective Rim Diameter ERD Calculate To determine the proper spoke length for a wheel build, start with the rim’s ERD. ERD is short for effective rim diameter, it is the maximum distance that spokes bridge going from one end of the rim to another.

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