but don't use plywood. It might be too slippery at that incline without wood "cleats" nailed to it.put bike in first and use starter to help push/drive it up plank
I still prefer dragging a platform on rails with the bike strapped to it. I've seen too many you-tube videos of people riding up ramps into pickups...A piece of thick plywood would do and is EZ but a pallet made is cheaper. ...But I would be thinking that it should work if I were doing it myself with friends merely "helping" .....