INJORA Silicone Rubber Insert Foam For 146-149mm (5.75" OD) 2.2" Tires

Features:

Soft and medium, two hardness are optional
Made of silicone rubber materials, waterproof and temperature resistant
172g (Blue) 164g (Green), heavy 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 out of tough situations

Specifications: