Wheel calibration question

Bigkevp

New Member
Hey all, took my hibike on my first road trip today and one thing I've noticed that my nyon (upgraded by myself from the standard computer) is displaying my mph @16 but it didn't feel like it so I checked with 2 other gps devices were showing 12mph, how can I calibrate it correctly? I've already measured the wheel circumstance and inputted that correctly....