MRR Sensored Competition Motor (HADMCL1016) by Maclan Racing®. Motor Turns: 17.5T. 1/10Th Scale Competition Motor. The concept of Maclan Racing MRR Series motor is to design a top performance motor in competition level with supreme quality standard. The goal is to build a 1/10 motor to suit the requirements of professional drivers and weekend club racers alike. It was designed to perform and compete out of box. The MRR modified class motors (3.5T to 9.5T) were developed with factory drivers. Maclans focus on the delivery of all controllable power to the wheels with maximized efficiency for high speed modified class applications.The MRR 13.5, 17.5, and 21.5 are designed for the most competitive applications in the RC car racing. With the latest hall sensor technology and highest grade copper wires, Maclans make no compromise in the stock racing.