AKA Racing 14007SR 1/8 Buggy Impact Soft with Red Insert Soft Red insert - our R series tires come with our World championship winning soft red inserts Tread Performance - Each tire tread is computer designed and track tested by AKA engineers Gil Losi, Mark Pavidis and team drivers. Lifespan: The long life of the AKA tires is due to the collective decades of rubber compound development Gil Losi brings to the table Balance: Like AKA inserts and wheels, tire balance is critical to superior performance and it''s a priority in AKA tires Mold accuracy: AKA tire molds are made in the U.S.A. using the most advance mold-making techniques and processes available