I learned on my schools Torker 24" CX, then, about two months ago I bought a Torker 20" LX. I can hope up stairs, 180, hope onto a box about 1 foot high, and can grind. The other day I hoped off a box that was about 2, maybe 2.5 ft high at the skate park and my rim bent a little bit. I can't feel the bent rim when I ride, but I'm still concerned. I certainly don't have the money for a new uni now, but what would you recomend if I want a new uni that can with stand 4 ft drops and grinding for the cheapest price?
have your tried to true the wheel. I have been carring a spoke wrentch most of the time I ride so that I can true the wheel a bit. Another quick fix would be to go to your local bike shop and see if they have a 48 spoke 20" rim that would be stronger. As far as unis go from what I have read a DX would be good but I dont know that from experience. Hope this helps