Originally Posted by Pattojnr

each colour is a different size. Orange ring is 13mm Rotor, Green is 12.8, and red is 12.5 (std )
if you want more punch from your motor, then either Green or Orange is the go. i have tried Orange in a 4T, and to say the least, it made it so dam punchy it was nearly undrivable. i would suggest the green rotor, as it will be one step up from std Red 12.5mm. the rotors are all the same for the V3, 1 Cell, and MMM. they all fit. as long as you get the one suggested for your Wind of motor. hope this explains it more.