This pair of 86mm rear shock springs, featuring a brown color code, are precision-wound from high-tensile steel for enhanced durability and consistent damping performance on your Kyosho vehicle. Engineered with a 1.6mm wire diameter and 11 coils, these springs are specifically designed for the Big Bore shock system, allowing for fine-tuning of suspension stiffness to optimize handling and stability during high-speed maneuvers and rough terrain. Replacing worn or damaged springs with these upgraded units will significantly improve your RC car's responsiveness and ability to absorb impacts, leading to a more controlled and enjoyable driving experience.