This shock spring is used on the rear shocks of the Traxxas Revo Platinum Edition. The truck handles really well with this spring installed in the rear shock. Also, it prevents truck from bottoming out during heavy acceleration or during landing after big jumps. Further, it also reduces the weight distribution during hard braking or acceleration, thus improving the handling and cornering of the truck. After I installed this on my truck, my truck handles like breeze. It is much quicker and responsive at the same time and handles corners really well. My lap times have increased considerably after installing this shock spring set. A must have part in any RC Driver's toolbox!!!