I don't know if this'll help, but I'll give it a shot. I weigh in at 250 and I've either .48 or .50's(I'm leaning towards the .48's) and running 100mm. Even w/my gravity challenged hunk of a bod;) , I haven't had any prob.'s bottoming. I've ridden ride mostly trail up until lately, but I just started to ride MX and have hit a few good jumps. The stock was set up way too light for me. I'd hit a 4' jump and get about 6' in the air and would bottom out on the landing(a flat one). Now, no prob.'s. Talk to Jer. He's da man.