[Longhorn Man]

I do miss the insulation, and never thought of a reversable one. I know it woulda come in handy a few times, eating sparks really sucks.
As for wheel thicknes... thick is good.
In the IRL, all the pit crews call cut off wheels death wheels. Some times you'll have a small crack in the wheel and the wheel with explode, and can cause a lot of pain in the process. pain... blood... death.. hence the name, death wheel. (I'm sure the kill rate is very low) I've only seen one wheel blow up,a dn the dude was almost as smart as a brick anyways, he would toss the thing over the engine and let it smack the ground.
<insert retarded crosseyed bugar eating moron smiley here>

I feel a thin wheel would be more prone to cracking. No proof... just common sense says so.