Chassis

[Thromgord]

Originally Posted by asid61

You can try putting omni wheels on the 4 corner wheels. That could fix it, because the omni rollers will allow the front and back to slide.

My thoughts precisely. The easiest but worst way of fixing this is to wrap electrical tape around the front and rear pair of wheels, like our team never has done*, because it causes a lack of overall traction while not really solving the problem.
*if you're wondering, we did this three years ago but don't want to admit it, as it's a poor solution.

...yep, going with Omni wheels is the best way to go.