Build an adjustable bike jump for kids

Step 2 Final Ramp Assembly

This is what the finished ramp looks like. The 1 x 4 ramp supports move up and down the horizontal 2 x 4 framing to raise/lower the height of the dowel. The ramp rests on top of the dowel. This ramp will go to 11" from the ground. That's pretty high (too high for any 4 year old I've met). Lowest height is about 5".

Minimum jump height is 7", but you can lay the jump supports flat on the base to create a 4" jump.