Didn't see your other question there the first time re little motor and the lift?
You don't know what a little motor is till you start pushing one around with a 2hp electric motor.
I lifted the Melex and my solution was to leave the tires stock size. I say
size because I did get a pr of tractor tread tires for the rear. Runs the same as before but with more clearance and travel. here's a pic and some drawings.
click on pics for bigger image:
