The I-BEAM tread design is designed for traditional tracks with a little bit of loose dirt. The larger lugs allow the tire to dig deep for maximum traction when it is needed the most. The center cross split bars give good forward bite and when used on the rear allow the car to rotate better in the turns when this is desired. 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.