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Originally Posted by sanddrag
I'm not sure if you witnessed the horrendus failure of several robots last year due to pneumatic wheels (I probably should note that many others had great success), but if you do it, do it right. Either use only two pneumatic wheels, or keep the track width much wider than the wheelbase is long, or have 6 wheels sith the center ones lower. In a standard 4x4 configuration, a pneumatic wheeled robot may hop and jump all over the place. I'm not saying pneumatic wheels are bad, I'm just saying make sure you really want them, and all the inherent problems that may come with them.
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You mean the problems that become apparent (such as turning) when you use tracks and your robot is longer than it is wide (IE the tracks are on the long side of the robot vs. the shorter side)? If so, we think we will be all set by using a 6 wheel drive and lowering the center wheel by half an inch or so (not a final number).