Description: Silicone RubberThis tire insert is made of silicone rubber material, without worrying about water ruining inserts, also easy to disassemble and clean. It improves traction and grip to help your rig to out of tough situations.Three layer DesignThe silicone insert has 3 hollow layers that users can cut off part of the liner or insert foam strips to realize different degrees of softness and hardness.Smooth and stable rideStronger and more resilient than foam inserts, the silicone rubber insert provides a side strength, better able to hold the weight of heavy rigs, helping to maintain the shape of the tire, which is not deformed under load and making it better suited to the road surface.FeatureOur 1.9" tire insert is specially designed for climbing cars, addtional significant weight for lower CG, improve the stability and control performance of your rc cars.For 1/10 RC crawlerThese inserts are suit for popular 1/10 RC crawler models. Specification: Material: Silicone Size Chart: Diameter:10.6cm/4.17inch Width:4.2cm/1.65inch Package Includes: 4RC Car Silicone Rubber Tire Insert Foam Note: Please allow slightly errors due to manual measurement and different monitors.