AKA pioneered closed cell inserts and their latest version os for 1:10 stadium trucks. This insert was designed to decrease the lateral deflection of the tyre while at the same time increasing the vertical impact absorption therefore providing better handling in the bumps. Using softer foam or hollowing out the inner circumference still leaves the truck feeling squirmy with a less accurate feeling through the bumps. Not to mention the loss of durability. Gil Losi Jr and Mark Pavidis knew this compromise was not the solution. The solution they found was the addition of lateral grooves to the inner diameter. The lateral grooves allow the insert to flex vertically to absorb the large impacts while still maintaining lateral stability and overall durability AKA inserts are known for. No compromises. The result is a more predictable handling truck without giving up durability.
33015 AKA 1:10 Stadium Truck Closed Cell Insert – Soft (2)
Source: AKA