INJORA 4pcs Silicone Rubber Inserts for 1/10 RC Crawler?118-122mm 1.9" Tires
Fit Tire Outer Diameter: 118-122mm(4.75" OD)
Fit Tire Width: about 42mm
Features:

Made of Silicone Rubber materials, waterproof and temperature resistant
70g/pcs weight offer counterweight effect and improve stability
More superb sidewall support than regular foam to keep the shape of tires
It improves traction and grip to help your rig to ouf of tough situations

Specifications:

Material: Silicone Rubber
Size: 110*36mm (4.33*1.42in)
Weight: 70g/pcs (2.47oz)

Recommended compounds:

Green: Softest, suit for 3-5lb RC Crawlers
Blue: Medium, suit for 6-10lb RC Crawlers
Red: Hard, suit for more than 15lb RC Crawlers
For best results, mix and match the inserts to match the front and rear of your specific vehicle

Package List:
4 * Silicone Rubber Inserts