This is pretty much the biggest ramp you can make from a single sheet of plywood for the two sides. It's way bigger than what I would want to try too lol. This ramp and landing was built for a friend ...

Building a 4-foot bike ramp and landing doesn’t need to be complicated or expensive. This guide shows how it can be done at minimal cost, with easy steps that anyone can follow for BMX, MTB, or dirt ...