Bike Tire Size Converter
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Bike Tire Size Converter

Jerry O
Written by Jerry O
Last updated on May 27th, 2026

Bike tire labels can be confusing because the same wheel may be described by ISO, road, mountain bike, or inch sizing. This converter gives you a quick way to compare common tire labels, ISO bead seat diameter, tire width, and estimated rollout.

Icebike gap tool

Bike Tire Size Converter

Convert common tire labels to ISO size, wheel diameter, and rollout.

How to use this tool

Choose a common tire size or enter the ISO bead seat diameter and tire width from the tire sidewall. Use the result to compare sizes before buying tires, setting up a cycle computer, or checking whether two labels describe the same practical wheel size.

What the result means

The converter is best for sizing and comparison. Always confirm the tire will fit your rim, frame, fork, brakes, and fenders before riding.

This tool is for planning and comparison. Check manufacturer limits, actual bike fit, and real ride conditions before making a safety-critical setup change.

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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