Tried the 21x12x8 8 paddle gliders yesterday at the dunes. I felt they were loose, slid real easy, and didn't pull as hard as my 20x10x10 7 paddle haulers. I like the softer ride with the larger tire/ smaller rim combo though. I do very little hill shooting, but i did pick up about two bike lengths. I like to climb hills, just not focused on the hill shoots. I'd much rather cruise the dunes and ride the bowls. I ended up wrecking twice because I lost the rear end and tumbled down the hill. I think I'll stick with my low profile, small diameter, sand throwing haulers for now and maybe just replace those super heavy itp c series wheels.