Originally Posted by
vr6cj
I might have to try this in my onroad then. This D4 isnt faster then my R1 wurks motors in my B5m with the 12.3 rotor that it comes with and I dont want to spend another 40 on it for the 12.5. lol....
The purple rotor is 12.3mm and more suited for onroad. Im sure your R1 has a 12.5mm rotor in it which is why you feel it performs better. However I bet if you put the 12.5mm rotor in the D4 you will be very happy. This motor is a torque monster like the D3.5 was but runs way cooler. The difference bewteen 12.3mm and 12.5mm sounds very minuscule but its a huge difference in performance especially in offroad.