Oh heck it booted

< > ;-)). But rubber is not the easiest material to turn to size - my gues < > is you need to take a very light cut... < < With a very sharp cutting tool! You don't cut it you grind it! If done on a lathe you turn the rubber part and run a high speed grinder against it. It's insures it will be concentric and gives a smooth surface. the alternate is to spin the tire and work against a hard surfaced abrasive board. < > As a kludge, and to ensure it is concentric with the spindle, why not < > the drive motor ? Put the oversize tyre on the spindle, get the motor < > turning (a knowledge of how the drive operates, and the interface < > signals, helps), and take a light cut over the surface with a sharp kn < > blade. disconnect the motor and power it from a supply rather than risk cooking the drive electronics. < Rather dependent upon the drive. In many, the tyre is rather < inaccesible, and then there is the risk of jamming things up with rubber < dust/shavings. that is an issue too. the solution is to demount the moter and work off drive. Allison