Calvin's Corner
Mechanical musing and industry insights from Park Tool Director of Education Calvin Jones.
1 post found in May, 2015.
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Written by Calvin on May 29, 2015/Calvin's Corner
Measuring Effective Rim Diameter
Wheel building begins with having the right components at hand. Basically, these are the hub, the rim, and of course spokes of the right length. Unfortunately, that last part, "spokes of the right length," is not always so simple to come up with. A big part of determining the correct spoke length is using the correct "Effective Rim Diameter" (ERD), a concept that is reviewed in this article.
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