Losi 1/8 Buggy Molded Inserts
Losi have released these molded foam inserts specifically designed for Losi 1/8 Buggy Tires. Featuring a special design and material formulation they ensure that the contact patch and side wall flex remain consistent and correct for the life of the tire. Unlike punched sheet foam or cheaply made generic inserts, these molded foam inserts will not break down and their consistency is second-to-none; one tire will not be softer or harder than the next, either of which can create serious handling problems.
Source: Losi [losi.com]