Rennen Design Group, located in Middleboro, Mass., is a rider-owned BMX company that specializes in what can most simply be described as high-tech BMX parts and training tools. Founded in 2003, Rennen was started after owner George Costa received his master’s degree in Mechanical Engineering from Massachusetts Institute of Technology. George’s background in robotics and mechanical engineering has led to some of the most advanced gears in BMX. Riders can choose from 22t-52t and can gain even more precise gearing with  … More