problem with weight and friction

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hi, I'm building a robot sumo but I have a problem, the robot does friction with the ground when you try to push something heavier than their own weight, what do you recommend? there is any way to move the weight pushed down to the wheels?
thanks

[mklrobo]

  Hello!
In reference to the issue you are explaining, as best I can interpret, I would
suggest using a physics book, specifically the REA solution series. They should have
a "free body diagram" for you to use.
To move a body at rest, on the ground, you have to overcome static momentum, and
once you have it moving, you use kinetic momentum, as best I can remember at this time.
I think the quick answer you are looking for is in the tutorials, in this forum. Good Luck!!