Originally Posted by davehour
Are you able to do backflips with it?
How high you can go with them?
Back flips? Not intentionally
On those ramps, a full speed run up will launch to low earth orbit. Just below GPS satellites. But you better have a large bowl of Jello to land in if you hit it full speed.
Seriously, you could probably get the bike about 8 feet high. The ramps are not huge which makes them nice and portable. Just a guess but I think they are about 16" high and about 30 inches long. Perfect for every day RC bashing.