Our 3D Printed TPU Tire Inserts are crafted with high-quality, flexible plastic that is temperature resistant and waterproof. They offer improved side-hilling, tire contact patch, and eliminate tire folding and rolling. Unlike their foam counterparts, you can expect an increased lifespan and maintenance of the original shape and composition. Perfect for 2.2 x 5.5 tires, this product is compatible with Proline and other brands.