Traction trouble

[Rickertsen2]

This year, our drive train works great, except one small problem: We are using the skyway wheels from the kit, but it is way to easy to burn out in them. They don't get enough traction. Does anybody know of any wheels of similar size that have much better traction from skyway or other sources? We have 2 wheel skid steering so too turning will not be a problem. We have room to double up the wheels or use wider ones. Any suggestions? DO the black wheels get more traction? What about modifying non-pnumatic tires? Please help!