The JConcepts Bossman tires are micro rock crawler tires measuring 63mm in outer diameter, designed for 1.3 scale crawler wheels. Sold as a set of two, they feature an aggressive knobby tread pattern suited for technical crawling terrain. The Green compound designation indicates a specific rubber softness formulation intended for enhanced grip on rocks and rough surfaces. Features: 1.3 scale fitment 63mm outer diameter Aggressive rock crawling tread pattern Green soft compound Sold as a pair 7/7/26 cs