Tune your RC rock crawler, trail truck, rock racer and 4X4's tires with foam inserts from top brands including Pro-Line, Pit Bull, Crawler Innovations, Team Ottsix and more. Every type is here: open-cell, closed-cell, urethane, dual-stage, multi-stage, soft, medium and firm for 1.5, 1.7, 1.9, 2.2, and 3.8" tires including Recon G6 Certified styles.