Reedy Sonic 540-M3 Competition Brushless Motors

Reedy Sonic 540-M3 Competition Brushless Motors

From Reedy:

For the last 12 months, the Reedy development team has been working behind the scenes utilizing a combination of new ideas and proven concepts to create the all-new Sonic 540-M3 Competition Brushless Motor.

On the outside, the 540-M3 appears very similar to the Mach 2, but look closely and you will realize that nothing has been carried over from the previous model. A 3-piece CNC machined can reduces weight while improving airflow, component fit, and bearing alignment. Heavy-duty silver-plated solder tabs are not only thicker to reduce resistance, but are also cupped to aid soldering, and well supported to prevent internal connections from fatiguing over time.

Inside, changes are less obvious but result in huge performance gains. Sonic 540-M3 Spec motors walk the edge of legality in exchange for maximum power output and RPM thanks to an all-new stator design, pure copper magnet wire, and low-resistance collector rings. Available short-stack 17.5 and 13.5 versions suit 1S-powered pan cars and under the right circumstances can create a power advantage in 2S-powered buggies, trucks, and touring cars.

Unlike Spec class racing, Modified is about controlling power. Sonic motors have always been known for their linear power delivery and the 540-M3 does not disappoint. A new stator design improves mid-range feel which both on- and off-road racers will appreciate.

A balanced, high-strength sintered rotor provides powerful, fade-free performance thanks to improved manufacturing processes. To fine-tune for specific applications and tracks, a variety of optional rotors are available. Lastly, larger precision stainless steel ball bearings have been fitted to accommodate high RPM loads with improved reliability.

Several versions are available and all meet ROAR, EFRA, and IFMAR specifications. Visit for a complete list of tuning rotors, replacement/option parts and detailed specifications.


  • CNC machined, lightweight 3-piece can
  • Aluminum end cap
  • Low-resistance, silver-plated solder tabs
  • Optimized air cooling
  • Dual-precision ball bearings
  • Balanced rotor
  • High-strength magnet
  • Adjustable timing
  • Completely rebuildable
  • Competition proven
  • Built to ROAR/EFRA/IFMAR specs


Cells – 1-2S LiPo
Diameter – 35.8mm
Length – 52.7mm
Shaft Diameter – 3.15mm
Weight – 170-176g


252 – Reedy Sonic 540-M3 Motor 25.5 Spec
253 – Reedy Sonic 540-M3 Motor 21.5 Spec
254 – Reedy Sonic 540-M3 Motor 17.5 Spec
255 – Reedy Sonic 540-M3 Motor 13.5 Spec
256 – Reedy Sonic 540-M3 Motor 10.5 Spec


257 – Reedy Sonic 540-M3 Motor 9.5 Modified
258 – Reedy Sonic 540-M3 Motor 8.5 Modified
259 – Reedy Sonic 540-M3 Motor 8.0 Modified
260 – Reedy Sonic 540-M3 Motor 7.5 Modified
261 – Reedy Sonic 540-M3 Motor 7.0 Modified
262 – Reedy Sonic 540-M3 Motor 6.5 Modified
263 – Reedy Sonic 540-M3 Motor 6.0 Modified
264 – Reedy Sonic 540-M3 Motor 5.5 Modified
265 – Reedy Sonic 540-M3 Motor 5.0 Modified
266 – Reedy Sonic 540-M3 Motor 4.5 Modified
267 – Reedy Sonic 540-M3 Motor 4.0 Modified
268 – Reedy Sonic 540-M3 Motor 3.5 Modified

1S Spec

269 – Reedy Sonic 540-M3 Motor SS 17.5 1S Spec
270 – Reedy Sonic 540-M3 Motor SS 13.5 1S Spec


Never miss an issue of RC Car Action!

Subscribe today with a Digital Edition subscription or Print + Digital combo!


Updated: August 24, 2015 — 11:51 AM
Air Age Media ©