Enhance your RC vehicle’s tire performance with these Traxxas 9875 1.0″ soft foam inserts designed to optimize the handling and climbing ability of TRX‑4M™ tires. These inserts help accommodate different vehicle weights and terrain conditions by providing the ideal balance of flexibility and support inside your tires. Sold as a pair, they’re a simple and effective way to improve traction, tire shape, and overall ride quality on trails and varied surfaces.