The RC4WD "Lil Nova 3.50" 1.55 Crawler Foam is the smallest dual stage foam available, with an inner closed cell ring designed around the RC4WD series of bead lock wheels and tires. The insert is perfect for any 1.5 size tire ranging in height from 3.50-3.95" tall.
These inserts feature a standard inner foam, with a medium density outer foam. The closed cell inner foam is super dense, water proof, is not temperature sensitive and is extremely durable. The conventional outer foam is not temperature sensitive, but it is not water proof.
Typically, you want to use a firmer foam in the rear than what you use in the front. This will help to prevent the truck from lifting the front end when climbing obstacles or steep grades. Additionally, the heavier the truck, the firmer insert you will want to use. Package includes two foams. Foams are also available in soft (CWR-2007) and firm (CWR-2009) densities.