After installing many Vitavon billet components wherever original chassis / drivetrain parts were too flexible, or wouldn’t hold up over time, my SCX6 Jeep was a bit heavier so the tires looked like they only had a couple pounds of air in them and were way too soft. The new foams work out great as they still allow the tire to flex & grip while crawling, but kept the Jeep stable in second gear at higher speeds. Now I’m going to put them in my SCX6 Truck with Super Swampers!