These 2.2-inch silicone tire inserts are designed for 2.2” RC crawler tires, focusing on sidewall support and stable tire shape during crawling. Made from 45A silicone rubber, the inserts use a hollow honeycomb structure to deliver controlled rebound and consistent deformation. Rather than ultra-soft compression, this design prioritizes durability, stability, and predictable handling on rocks, dirt, and uneven off-road terrain. Unlike traditional sponge foams, silicone inserts are fully waterproof and do not absorb water. They can be easily cleaned and reused after muddy or wet runs without losing performance. Compatible with most 2.2” crawler tires, each set includes 4 silicone tire inserts in Yellow color. Please confirm tire size before purchase.