[Jon Stratis]

Well, it definitely sounds like you need to reduce friction. I can think of a few of ways to do that...

1. you can decrease your wheelbase (the distance between the wheels). That's basically what a drop-center drive train is. So, this breaks up into 1A and 1B - alter your wheel spacing, or add/increase the drop for your center wheel.

2. You can increase the pressure in your wheels (up to the manufacturer recommended max pressure). Increasing pressure will make the wheels less squishy, which reduces the contact area, thus reducing friction. If you look at any websites about hypermiling, you'll see one of the first things they do is get skinnier than normal wheels and over-inflate them. In fact, to increase gas mileage on the Gen 2 Prius, Toyota sold it with skinnier wheels to begin with in the US than they did in some other countries!

3. You can replace your wheels with other ones (normal traction, omni, etc). This could reduce friction quite a bit. Going to a pneumatic/omni setup would have the advantage of pneumatic wheels to hit the defenses with up front (while dragging the omni's through on the back side), and easier turning from being 50% omni.