Originally Posted by JRRobiso

I have a SpeedPassion V2.0 5.5R motor with 5mm shaft and I need to know if this motor is a 540 or 550. The motor had a product insert and had it as 540L motor which I have no clue what the L stands for. I've been away from electric RCs for the past 2-3 years and been doing nitro during that time, so I have no clue of the recent advancements of BL motors nowadays.

If I understand correctly, AE suggests to use 32P spur/pinion gears for 550 motors and 48P for 540. My problem is that I already purchased a 13T pinion for my kit and now I'm not sure if the motor I have is a 550 or 540. If my motor is in fact a 540, do I have to buy 48P pinion gear that can fit a 5mm shaft or can I still use the 32P spur/pinion gear set-up?

Thanks in advance for the help and pardon me for asking silly questions.