The Tamiya Lightly Tuned Motor (28T) is perfect for installing into M-03 & M-04 chassis to participate in official Tamiya races. It provides more torque than the normal RS-540 type motor, and can sustain it's high performance for long durations. This motor is also compatible with touring car chassis and is a great upgrade for beginner drivers to let them gradually adjust to higher performance motors. About this Product Number of turns = 28 Usable Voltage = 7.2v Torque at best efficiency = 564g/cm (7.2v) RPM at best efficiency = 16,300rpm (7.2v) Manufacturer: Tamiya Model: 53983 Lightly Tuned Motor (28T)