HBR Sponge Tires Rear 3645, rear tire set

HBR Sponge Tires Rear 3645 is a rear tire set with 2 foam rubber tires built for F1 circuit use. The sponge compound is specified for permanent rough-eyed, high-grip circuit racing, giving the rear axle a track-focused contact surface when a worn set needs replacement or a fresh pair is prepared for race use. Each tire measures 45 mm in width, with a 64 mm outer diameter and a 36 mm inner diameter. Those dimensions make the set easy to match against an existing wheel and chassis setup before installation. The pair is described for the F103 chassis and can also be used on any vehicle except F103LM, which provides a clear boundary for compatibility instead of a vague fit claim. As a 2-piece rear set, the contents stay focused on the axle that carries drive and corner-exit load in F1-style running. On the bench, the stated measurements help with quick comparison against current race tires and stored spares. At the track, a fresh rear pair supports setup changes for high-grip surfaces where sponge tires are the intended choice.

 

Warning! Not suitable for children under 14 years.