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Spoke Length Calculator

Jerry O
Written by Jerry O
Last updated on May 31st, 2026
Icebike gap tool

Bike Spoke Length Calculator

Estimate spoke length from ERD, hub flange, flange offset, spoke count, and crossing pattern.

Use this spoke length calculator to estimate spoke length before ordering parts for a wheel build. The result depends on accurate rim ERD, hub flange diameter, center-to-flange distance, spoke count, and lacing pattern.

Measure before ordering

Small measurement errors can produce the wrong spoke length, especially on deep rims or unusual hubs. Use the rim maker ERD as a starting point, then confirm it if you can measure the rim directly.

After building or changing a wheel, check tire fit and rollout with the rim width to tire size chart, wheel circumference calculator, and bike tire pressure calculator. For tubeless wheels, use the tubeless sealant calculator.

Build caution

This tool gives a calculated starting point. Wheel building still needs even tension, correct dish, and stress relief. If the wheel is for heavy cargo, e-bike use, or rough winter riding, get the build checked by a wheel builder.

Should you have any questions or require further clarification on the topic, please feel free to connect with our expert author Jerry O by leaving a comment below. We value your engagement and are here to assist you.

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Jerry O

Jerry O

Jerry is a competitive professional cyclist with extensive experience in both road and mountain biking. He has competed at a national level, winning multiple races and earning a reputation as a top-star athlete in his local cycling community. In addition to his success on the race course, Jerry is also an experienced bike mechanic, with a deep understanding of the mechanics and technology of bikes.

Jerry's expertise in the cycling world is reflected in his writing for IceBike.org, where he shares his knowledge and experience with fellow cyclists of all levels. With a focus on providing accurate and reliable information, his articles cover a wide range of topics, from training, bike and gear reviews and maintenance tips.

As an active member of the different cycling community, Jerry is committed to promoting safe and responsible biking practices and helping others achieve their goals in the sport. With his wealth of experience and expertise, he is a valuable contributor to the IceBike.org team and an important voice in the cycling community.

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