Belt Sizing Guide 250-5m-15 Belts (STOCK STREET SET-UP): This is stock for the street configuration Evolve GT, Evolve GTX, Evolve GTR, Evolve One, Evolve Stoke, and Evolve Hadean. Use with the stock 32T pulley. 260-5m-15 Belts: Use with 38T street pulleys. 295-5m-15 Belts: Use with 47T all terrain pulleys. These are typically used with the 6-inch all terrain tires. 360-5m-15 Belts (STOCK ALL TERRAIN SET-UP): This is stock for the all terrain configuration Evolve GT, Evolve GTX, Evolve GTR, Evolve One, and Evolve Hadean. Use with the stock 66T pulley which is paired with the stock 7-inch all terrain tires. Our belts are made by one of the largest timing belt manufacterers in the world. The combination of the neoprene body and kevlar reinforcement provides the highest level of strength, durability, and longevity possible. In fact, our belts use the same kevlar webbing that is used in Top Fuel Dragster Supercharger belts! Not sure what this means? It means these belts are CRAZY strong. Ride the best. Ride HyperDrive.
