Posted 10/6/2008 23:54 (#476485 - in reply to #475666) Subject: Re: incorrect speed readout on JD 9760
You need to input the rolling radius (in mm) in this address. I you mark the tire to the ground and drive 1 rev and measure the distance, than divide this by 6.28 that will give you rolling radius (times 25.4 if you measured inches). This is the best and easiest way to figure this out.