The SDS Colson Wheel seamlessly intergrates into the MK4 and MK4i Swerve Modules for maxmum performance. Description Specifications Documentation With custom hubs, this offering from SDS has competition-tested performance combined with seamless integration into the MK4 and MK4i Swerve Modules.Colson Performa Wheels have been used extensively in BattleBots and FIRST Robotics Competitions, and are widely lauded as an intelligent choice for swerve. The durable co-injection molded construction of a thermoplastic elastomer tread permanently bonded to a polyolefin core helps ensure the wheel can withstand the rigors of robot competitions while being friendlier to non-carpeted surfaces and providing a more consistent performance throughout the life of the wheel compared to roughtop tread. The aluminum hub is secured to the bevel gear using three screws which captures the wheel. This setup provides a simplified replacement process for heavy use during competition season. Included Items: Included Components in am- 5173: 3 - Black Oxide 10-32 1 in. Long Cap Screw (Similar to am-1056) 1 - Hub 1 - Colson Wheel (am-5171) Included Components in am-5261: 3 - Black Oxide 10-32 1 in. Long Cap Screw (Similar to am-1056) 1 - Hub 1 - Colson Wheel (am-5171) 1 - Bevel Gear (am-5235) ---------------------------------------------------------------------------------------------------- Diameter: 4 in. [100 mm] Width: 1.5 in.