I tried my buddy's Panthers X and I didn't notice a difference vs pushing my Lasher BT-Mg. Then I did the math. I weigh 170lbs. My chair weighs 21.5lbs. With my cushion the Panthera X weighed 16lbs. Total rolling package 191.5lbs and 186lbs, respectively. Then I realized why I couldnt notice much of a difference. There really wasn't much of difference to notice. It was when lifting the chair that the difference was remarkable. 5.5lbs is ~25% difference on a 20lb chair but on a nearly 200lb total package it's only a couple percent.