If it s easier and more cost effective to acquire wood beams planks a saw nails and a nail gun build a wooden ramp.
Build a bike ramp out of wood.
Now for the length you could measure the length of the curve with a piece of string or just blast on.
How to make wooden bike ramps.
Lay the ply over the curve get your mates to stand on it while you screw it to the cross members about four per cross member should do it.
Using the jig saw and the circular saw cut the plywood sheets depending on the s i ze of the bike ramp that you want to establish.
This is what a standard piece of plywood measures when you cut it down the middle lengthwise.
Then drive a screw to hold it.
Measure the width of the ramp and cut the 9mm plywood to suit.
This is another portable diy kicker ramp but with a little more height to it.
Building a dirt bike ramp is no joke whether you re constructing it out of wood or digging it into the ground.
2 cut groves in the ramp so you can place the support beams in example if the ramp is 30 inches 76 2 cm from the bottom to the take off point cut groves every 10 inches 25 4 cm.
Things to keep in mind.
Get your ramp deck and align it on the frame.
Make four copies of each and make sure that all of them are in the same sizes.
Check out this kicker ramp build from undialed that is 1 5 high and 4 long.
If you or a friend have easy access to a backhoe or other heavy duty digging equipment dig out a dirt jump.
Check out sam pilgrim s portable kicker ramp build.
The back side of the deck should have the horizontal scores that will allow it to flex.
The ramp lip take off and landing both measure 24 inches wide.
Check out this seth bike hacks kicker ramp build.
If you re building both the lip and landing you ll only need 1 piece of 1 2 inch thick plywood.
This video also teaches you how to use the pythagorean theorem in building ramps.