Spektrum RC Firma 3-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: 
3–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: 55T
Motor Size: 540-Size
Motor Type: Brushed
Application: 1/10 Scaler/Crawler
Bushing Or Bearing: Bearing
Connector Type: 3.5mm Bullet
Number of Poles: 3
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