"Ricky Johnson portable motocross dirt bike launch ramp system, great for running double grabs, nac nacs, can cans, and more big air jumps. The signature dirt bike jump ramp has been custom designed by Ricky Johnson with a 20 foot curve radius over 102""L x 40""W x 40""H for seriously big air tricks. Each launch ramp folds compact for travel in the back of a van. Maximum 6,000 lb capacity grated steel surface over a cold-rolled steel frame.."