Beach RC says... The GRIDIRON tire is designed for tracks that are hard packed and or tracks with little dust. This tire design is a great outdoor or indoor alternative. The square outer pins and bar center pins allow for great traction and long tire life compared to other small pin tires. The EVO version of the GRIDIRON has been revised with more tread density for better performance and wear characteristics. The new EVO Truggy tires feature the new ROAR legal 1:8 Truggy bead design and a redesigned carcass shape that includes internal ribbing. The new bead design mimics the 1:8 buggy bead design which will make for easier assembly and a stronger bond between the wheel and the tire. The carcass shape has been refined to take advantage of the new bead design. Internal ribbing has been added to minimize tire growth at high RPM and support the tire contact patch during cornering. All this adds up to much improved handling and lower lap times.