[ngreen]

We are using pneumatic go-kart racing slicks again this year but upgrading to 12". If you are looking for traction these are superior. If you are looking to not cry when you put your robot on a scale find another source. They weigh like six pounds each. And we are using four in a four wheel drive skid steer setup. No one is pushing us off a six inch step...Unless we do it to ourselves. Lol.