Bike Forums - View Single Post - Bike Computer Wheel Circumference Chart(s)

08-13-09 | 08:45 PM

#6

CliftonGK1

Senior Member

Joined: Jul 2006

Posts: 11,373

Likes: 8

From: Columbus, OH

Bikes: '08 Surly Cross-Check, 2011 Redline Conquest Pro, 2012 Spesh FSR Comp EVO, 2015 Trek Domane 6.2 disc

Quote:

Originally Posted by tippy

How exactly is this awkward? Your not trying to bend the scale around the wheel are you?

Take bike out of garage. Find nice flat surface. Set wheel on surface with valve stem at 6 o'clock. Mark surface beside valve stem. Roll wheel until valve stem is at 6 o'clock again. Make second mark on surface. Put bike back in garage. Pick up awkward tape measure and go back outside. Lay tape measure nice and flat between the two marks on the surface (about 7 feet apart). Take reading and convert to millimeters. Take millimeter number and plug into cycle computer. Feel proud when telling everyone you accomplished a very awkward task !!!!

+1
Triple roll-out and average the measurement. I actually use a line of stamp-pad ink on my tire, and ride it for a couple revs of the tire, that way I get the "true" measure of the flattened out tire under my weight.

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