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METHOD 2.
Mark the tread of the front tire with a line and roll the tire perpendicular to the ground. You can also use the valve as a
mark. Mark a line on the ground. Move your bike on a fl at surface straight ahead for one complete wheel rotation. Check that
the tire is perpendicular to the ground. Draw another line on the ground exactly where the mark on the front tire touches the
ground.
mm
-4 mm
mm
42
–
ENGLISH
Measure the distance between the two lines on the ground.
Subtract 4 mm to account for your weight on the bike to get your wheel circumference.
This is the value you must set on the cycling computer.
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