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Kevin,
Nice video, Is that you being dragged behind your robot? This year we went with wheels again & we didn't have any problems with traction. You probably remember the huge wheels we used last year (nats). This year we just went with pneumatic 9" skyway wheels & lowered the pressure. We had more than enough traction. we can push without trouble & on top when we turn sideways we don't get pushed. We are only using 4 wheels in 4-wheel drive. Mostly, we used a tried & true chassis. We don't have $$ to experiment with different things this year.
BTW, Good luck, Its great to see that you guys are still going.
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