Spektrum RC Firma 5-Pole 540 Crawling Motor. This optional rebuildable brushed motor is a great upgrade intended for 1/10 scale crawlers. The timing can be adjusted from 0-20° allowing you to tune the motor to best suite your needs. Package includes one brushed motor. 

Features: 

• 5–Pole design maximizes smooth throttle control at low speeds and efficiency
• Fully Rebuildable for simple maintenance and increased motor lifespan
• Adjustable Timing for expert level tuning

Specifications: 

• Turns: 16T 
• Motor Size: 540-Size 
• Motor Type: Brushed 
• Application: 1/10 Scaler/Crawler 
• Bushing Or Bearing: Bearing 
• Connector Type: 3.5mm Bullet 
• Number of Poles: 5 
• Length: 2.1" (53 mm) 
• Diameter: 1.4" (36 mm) 
• Shaft Diameter: 0.125" (3 mm) 
• Product Weight: 169g (6.0 oz) 
• Adjustable Timing: Yes 
• Water-Resistant: No