Reedy Sonic 540 M4 Brushless Motor 7.0T Modified de Version

The Reedy Sonic 540 M4 Brushless Motor 7.0T Modified DE Version (AS27491) is the Driver Edition developed with input from Reedy’s international racing team. Technically identical to the standard 540-M4, this DE variant is factory-fitted with the AS27447 rotor, the lowest-strength option in the range, to deliver a smoother, more linear throttle feel and improved consistency for better overall race times.

Engineered for competition, the Sonic 540-M4 DE combines a CNC-machined lightweight can, optimised cooling, and low-resistance silver-plated solder tabs with a balanced rotor and dual precision ball bearings. Adjustable timing and a fully rebuildable design support fine tuning and straightforward servicing over the life of the motor. Four versions featuring the most popular “dirt” winds are available initially, with the potential for more to follow. All Sonic 540-M4 versions are ROAR, EFRA, BRCA, and IFMAR approved.

Key Features

• CNC-machined lightweight can
• Aluminium end cap
• Low-resistance, silver plated solder tabs
• Optimized air cooling
• Dual precision ball bearings
• Balanced rotor
• Performance specific magnet
• Adjustable timing
• Completely rebuildable
• Competition proven
• ROAR, EFRA, BRCA, and IFMAR approved

Specifications

• Cells: 1–2S LiPo
• Diameter: 35.9 mm
• Length: 50.3 mm
• Shaft Diameter: 3.15 mm
• Weight: 160–170 g