This is a set of four AKA Racing 1/8 Buggy Grooved Foam Inserts. These are the "last bullet in the clip" for AKA's assault on the 2010 IFMAR World Championships in Pattaya, Thailand. To compliment the release of the EVO wheel and the IMPACT tire, the new soft red insert was designed to decrease the lateral deflection of the tire while at the same time increasing the vertical impact absorption therefore providing better handling in the bumps. Using a softer density foam or hollowing out the inner circumference leaves the car feeling squirmy and less accurate through the bumps. Not to mention the loss of durability.