The Crawler Innovations Deuces Wild 2.2 Standard Single Stage Closed Cell Foam is recommended for medium - high speed and light rock work. The Deuces Wild 2.2 was developed for use in the RECON G6 trail & RECON EXO Terra racing rigs and is recommended for scale rc vehicles that weigh 8 pounds or more. This insert fits the Axial BFG Crawler and Ripsaw, HB Rover and Sedona, Panther Leopard and Cougar, as well as other tires of similar height and width. The closed cell foam material is super dense, water proof, is not temperature sensitive and is extremely durable. Features: The foam is 100% water proof Recommended for scale rc vehicle weighs 8 pounds or greater Can be adjusted / tuned by the user by removing the O.D. ribbing with scissors to increase forward bite Designed for use in the RECON G6 trail & RECON EXO Terra racing rigs