Originally Posted by Carl Giordano

I’ve decided to stick with one brand of motors (Reedy Sonic) as a means to minimize racing variables and find the optimal set-up for speed and torque between speed control and motor. I’m using the new LRP SXX Stock Spec speedo for 1/12th scale 13.5 boosted.

What is the difference with the following Reedy Sonic rotors and when should someone switch out rotors? Also, could someone suggest a good brushless motor tuning machine? (and I thought brushless motors was suppose to spare us from the brushed motor tuning crap)

On the website the following are listed:
#954 – Sonic Stock 12.3 x 24.2
#955 – Sonic Stock 12.3 x 25
#956 – Sonic Stock 12.5 x 25
These three (3) rotors all have same 7.25mm reference? what does this mean?

#957 – Modified 12.2 x 25
# - Modified 12.5x25
These two (2) rotors all have the same 5.0mm reference? what does this mean?

How do the above differ from the #908 540 – SL rotor?

At the track someone mentioned Reedy Sonic sell a rotor specifically for 1s racing? Can’t seem to find it on the website? At a local track, Donnie Lea, ROAR national champion is having great success with the LRP SXX and LRP X12 motor combo.

Thanks for your help in advance.