for a recently new injury, the one wheelin is selling works good until a person builds enough strength to transfer to lower seats, i have a quickie mach 2(similar to that of wheelin) that i used sitting in my shed, never could sell it, thought about giving it away to get rid of it, it's a 16x16 short frame. i think it's suppose to be good to a person 5'-6". However it is of no comparison to the racier low sitting handcycles, but when transfering is a problem it's a good start, just not good for long distance or high speed rides.