We got in a huge dump when I had mine. I was trying to get a 4 gallon jug to the top of the mountain. I finally had to unload it on second chute. Too insane to try and ride. I seen a guy weigh one wet with 4 gallon jug on it. It was 628. I had my bag on also. That's turbo nytro territory with my bag.It's probably their rear skid design and the fact that are so much heavier than a Summit. Looking at the Lynx website the Shredder RE weighs about 35 pounds more than a Summit X.