The GPM TRX4MZSP21B tyres are engineered for focused traction and durability on TRAXXAS TRX4M Ford Bronco and Land Rover Defender platforms. The 25-degree super soft rubber compound enhances surface contact and delivers an estimated 35% increase in grip versus plastic tyres, while the reinforced internal architecture reduces tear propagation and extends service intervals. Butyl rubber composition maintains consistent adhesion on damp terrain, and the supplied foam inserts combined with reinforcement provide stable support for 1-inch wheel assemblies.