Short Course 4WD is quickly becoming the one of the most popular competition classes in America. To satisfy the power demands that this class requires, Reedy developed the Sonic 550.
 
Designed specifically for the Short Course 4WD class and intended strictly for competition, the Sonic 550 features a lightweight case design with extra-large strategically placed vent holes to reduce operating temperatures. Lower temperatures result in less fade over the course of a race, longer run times, and increased motor life.
 
Sensored operation results in a smooth and controllable power band with no cogging. A high-torque rotor is supported by dual ball bearings for maximum power output and reliability, while adjustable timing allows for fine tuning for particular applications and tracks. Service is easy and economical thanks to a completely rebuildable design.
 
A choice of four ROAR-approved models means that there is a Sonic 550 motor to suit all tracks and conditions.
 
Features
 
 
Lightweight design 
Optimized air flow 
Dual precision ball bearings 
High-torque rotor 
Adjustable timing 
5mm shaft 
Completely rebuildable 
Competition proven 
200mm sensor wire 
Built to ROAR specs
 
Specifications 
Cells: 2S-3S LiPo
Diameter: 35.8mm
Length: 65.3mm
Shaft Diameter: 5.0mm
Weight: 243-253g