... But that front tire diameter can increase with speed and there might be some slip of the front wheel; not likely very much, but who knows. ...
Bryan,
I too am concerned with the "slip":
http://www.landracing.com/forum/index.php/topic,14323.0.htmlAt this point I'm looking for advice, not giving it.
But it sounds like we are doing something like what you are planning.
Our new lakester is set up with a Racepak system to record calculated mph from both the front (driven) & rear (passive) wheels as well as directly record GPS mph.
One of our priorities at WOS will be to calibrate F & R mph to GPS mph and from that data calculate and display % Slip of the front wheels.
I am 110% sure that I am way over the top on my obsession on logging mph & on our cool lil box, the % Slip Display.
But i got pretty successful at calculating gearing needs of my bikes, and found it satisfying to NOT be changing sprockets at the track.
Karl