HPI Racing Inner Foam 2.2in Medium RC Tyre Insert - HPI4690

The HPI Racing HPI4690 tyre foam insert is a 2.2-inch medium-density inner foam designed for use with 2.2" RC crawler and off-road tyres. Foam inserts sit inside the tyre carcass to control sidewall flex, maintain tyre shape under load, and prevent the tyre from collapsing during technical terrain or low-speed crawling. The medium compound makes this HPI Racing insert a versatile choice for mixed surfaces where you need a balance between cushioning and support.

Key Features

• Sized for 2.2-inch RC tyres, the standard fitment for 1/10 scale crawlers and many off-road radio control vehicles
• Medium density foam provides a balance of sidewall support and compliance, suitable for trail crawling and general off-road use
• Fits inside the tyre carcass between the tyre and rim to maintain consistent tyre profile
• Directly replaces worn or compressed foam inserts to restore consistent handling

Compatible With

• 2.2 inch RC crawler tyres
• 2.2 inch off-road RC tyres (1/10 scale)
• HPI Racing 2.2" wheels and tyre combinations
• Compatible with any RC vehicle running standard 2.2-inch tyres