Reedy Sonic 540 M4 Brushless Motor 6.5T Modified

The Reedy Sonic 540 M4 Brushless Motor 6.5T Modified (AS27444) is a competition-focused 1:10 motor engineered to deliver the linear powerband and strong mid-range feel that Reedy motors are known for. Building on the proven M3 platform, the M4 relocates the inner bearing into the can to more precisely centre the rotor within the magnetic field, reducing noise and vibration for smoother, more efficient power delivery.

A shortened can centralises weight in the chassis and, together with refined can geometry, trims approximately 5–10 g compared with its predecessor. A balanced, high-strength rotor ensures fade-free performance run after run, while precision stainless steel ball bearings reliably handle sustained high RPM loads. For fine-tuning to track conditions, optional rotors are available. Adjustable timing, low-resistance solder tabs and optimised airflow further enhance tuning range and thermal performance.

Built to ROAR/EFRA/IFMAR specifications, the Sonic 540 M4 6.5T combines race-ready construction with a fully rebuildable design, making it a compelling choice for serious 1:10 electric racers seeking consistent speed, efficiency and durability on carpet, astro or tarmac.

Features

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

Specifications

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

Suggested Compatibility

• 1:10 scale competition RC vehicles
• Systems running 1–2S LiPo packs
• Chassis accepting 540-size brushless motors