[thefro526]

We've used both metal and plastic wheels in some of our previous drivetrains and I haven't really noticed a functional advantage from either material.

Back in 2006 and 2007 we used the IFI High Traction wheels (Now sold under the VEX Pro brand) because they were one of the only COTS High Traction wheels at the time.

Since then we've used AM Kit Wheels and Plaction Wheels and all of them have held up fine. We'll probably continue to use Plaction Wheels in the future because of their low cost and durability.

I guess if we were making our own wheels we'd probably go with some sort of Aluminum though, just because we have more experience with it than plastics.