Originally Posted by LukasM
Why do you think that is? If you placed the non-measured wheel at equal height and just supported the bike from falling over to the side, this should work very accurately. Provided that your bathroom scale is accurate, of course. They operate in pretty much the exact range we need for one wheel.
Eggzakly. Sometimes I wonder if you guys ever took high school physics. The wheels push down the same whether they on the garage floor or a set of scales. The wheels don't know what they are on. As long as the tires are the same elevation and the bathroom scales are accurate in the 2-300 lb range it's simple physics.