Reply to "Pre cal-vs-Post cal"

mikesandfordMember

An unlikely, but technically possible explanation, would be if the front wheel was rubbing the brake during the pre cal, but was running completely free during the post cal. Increased resistance to the rolling of the front wheel has the effect of INCREASING the effective rolling radius of a pneumatic tyred wheel.

It is unlikely because quite a bit of friction would be required for an increase in calibration constant of 0.1%, and it would be noticeably hard work to ride the bike. The rider would have surely got off and adjusted his brakes.

A leak is most likely. Ask the rider to go out and calibrate his bike again today, and by the way report back if the tyre is flat.

3/25/113:38 PM

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