VEXpro Colson Performa Wheels, 1/2in Hex Bore - VEXpro 217-4049, Colson Performa wheels are some of the most widely used and recognisable in large-scale competition robotics. Originally designed for industrial material handling applications, their ideal balance of traction and durability make them a natural fit for VEXpro\'s uniquely demanding environment.When VEX Robotics engineers combined their experience on the playing field with Colson\'s top wheel designers the result was simple and effective - lightweight VEXpro hex hubs moulded directly into the Colson moulds which robotics teams have been using for years. VEXpro 217-4049 Colson Performa (4\" x 0.875\", 1/2\" Hex bore)