AKA Racing 34101S 1/8 Truggy Shaped Insert Grooved Red Soft 4From the ManufacturerBased on our World championship design of our 1: 8 Buggy red inserts, the EVO Truggy closed cell red insert has been track tested and designed for the EVO Truggy tires. We beefed up the design of the EVO Truggy insert to offer unmatched tire support while improving handling through thebumps. The EVO closed cell insert foam is the same quality foam that our customers have come to rely on from AKA. The inserts are water resistant