Printable cycling worksheet
Measure bicycle wheel circumference by rolling the tire
Wheel circumference, also called tire rollout, is the distance traveled after one full wheel revolution. Measuring your own tire improves the relevance of the cycling cadence and speed calculator versus using a generic default.
Five steps to a wheel rollout measurement
- Inflate the tire to a suitable pressure for normal riding.
- On a straight level surface, mark the point where a recognizable tire mark touches the ground.
- Roll the bicycle forward under its normal rider load until that same mark touches the ground after exactly one wheel turn.
- Measure the separation between the starting and ending marks in millimeters.
- Repeat three times, calculate the average, and divide by 1,000 to convert millimeters to meters.
Example: 2094 mm, 2097 mm and 2096 mm average to 2095.7 mm, or about 2.096 meters. That example is not a universal wheel size; measure your actual bike.
Bike Wheel Circumference Worksheet
Finish Line Labs · Measure loaded tire rollout
Date: Bike and tire:
Tire pressure: Rear/front wheel:
Before measuring
Tire inflated to normal riding pressure
Flat, straight measuring surface
Normal rider load on the bicycle
One complete wheel turn for each measurement
Record three measurements
| Trial | Measured distance |
|---|---|
| Trial 1 | ________________________ mm |
| Trial 2 | ________________________ mm |
| Trial 3 | ________________________ mm |
| Average | ________________________ mm |
| In meters | Average ÷ 1000 = __________ m |
Notes: _________________________________________________________
Enter the measured circumference (meters) in the Finish Line Labs Cycling Cadence & Speed Calculator.
Which bicycle wheel should I measure?
For a traditional chain-driven bike, the rear wheel is driven by the drivetrain, so measure its tire rollout for gear-ratio speed calculations. Tire pressure and rider weight can change the measured loaded circumference; repeat the setup when you compare measurements.
Why it matters for cycling pace
Distance per crank turn = wheel circumference × front chainring teeth ÷ rear cog teeth. At 2.10 m circumference with 50/17 gearing, one turn moves the bike approximately 6.18 m under ideal conditions. Wind, hills, resistance and coasting mean actual average speed can vary.