I have been using this for my street and dirt bikes. It is strong enough to handle a four wheeler as well.
Big Boy II Folding Motorcycle Ramp System - 8' to 12' Long | DiscountRamps.com
zaster and mito what length did you get?
I just moved from an SUV to a GMC Sierra 4x4 truck.
I bought a Black Widow foldable ramp. Putting the bike (1098S) in for the first time was no big deal, unloading it at COTA in the rain was scary as the tires just slipped on the ramp cross rails.
So I bought 4 sheets of 12" x 24" x 1/8" from McMaster Carr. I secured these to the rails and then put self adhesive AntiSlip tape on the shiny side.
I also use a 2' x 10' plank, with AntiSlip, to walk up and down next to the bike.