Factory Team aluminum hubs for the RC10B7. These hubs are a more durable alternative to the molded hubs and provide more unsprung weight, which can be used as a tuning option. The HRC (High Roll Center) hubs include the secondary bearing bore for the Factory Team Universals. The HRC hubs allow for higher axle heights, which is great when running on high grip surfaces with smaller diameter tires and lower ride heights.