I have a set of the steel lawnmower ramps from sears. Long, Folding, and arched so you dont scratch your bike's underbody. $100 oh yeah and they are damn stong. I actually lay them on cinder blocks and drive my car up on them when I need to change the oil. http://www.sears.com/shc/s/search_10153_12605?keyword=ramps&x=0&y=0&vName=