[Veselin Kolev]

We use 6" skyways turned down to 5" and rivet on wedgetop belting. So.. we use six 5.5" wheels. Sanddrag has a point, you dont need very big wheels to get up the ramp. We used skyways because they're like, 5 bucks each, have precision bearings, weigh next to nothing, etc. So our team bought twenty. We have 1" of clearance below the chassis, but we get up the ramp smooth. We have strategically placed rollers on the underside of our chassis, so we never beach.

I say, the bigger the wheel, the harder it is to fit and the harder it is to get a reduction that big. However, the smaller the wheel, the more your tread dies because there is less of it. I think 5-6" wheels is the perfect balance for what my team needs.