I noticed in the Mad Max video above they were always going DOWN that steep gravel hill, never going UP. I doubt very much they could get up. I have a Scorp FS and a Lepus delta with Diff. NO comparison. On a steep gravel hill my Scorp ended up in a ditch-first and last time I ever walked a trike up a hill. The Lepus ate the hill for lunch and scrambled up like a mountain goat. The problem with tadpoles offroad-the first steep even semi-steep muddy, gravelly, icey etc. hill they meet, you are mostly likely going to walk. The Lepus and the Kett with Diff-unstoppable.