Reedy S-Plus 12.5mm Rotor. This is the optional "Hi-Torque" rotor that will help produce better low end torque and better brake strength. This rotor will also hold up better during a race as it will not fade as much as other rotors. These features will leave you with a super balanced and extremely smooth motor. Package includes one optional rotor intended for these Reedy Motors ASC27401, ASC27402, ASC27403, ASC27404, ASC27428 and ASC27429.