Spektrum Firma 85A Brushless ESC & 3300KV Motor Combo

Regular price $109.99

Free Pickup option available at our storefront in Jacksonville, Florida. Shipping also available to all 50 US States & Territories. See Shipping Policy for shipping cutoff times.

Like every component in the Spektrum™ Smart ecosystem, Firma™ Smart ESCs combine "plug-and-play" simplicity with the ability to communicate with other Smart electronics — together, creating the best-performing RC system for your vehicle imaginable.

With Firma Smart ESCs, you'll be better connected to your vehicle than ever before — without installing extra components that all work independently of each other. You won't need extra wires, modules, or links. A Firma electronic speed control provides a one-wire solution for obtaining telemetry data such as RPM, temperature, battery voltage and capacity.

Firma ESCs not only gather the data but also send it to your transmitter in real time, instead of only storing it for after-run study. You're able to adjust settings as needed to boost performance on the go. The Firma Smart single-wire telemetry solution has been tested for quality and performance by the best brands in RC. Their verdict? Smart technology is both simpler and superior!

Now includes a compatible 3300Kv Firma Brushless Sensorless motor when you purchase the combo.



  • Smart all-in-one telemetry
  • Fast, powerful 32-bit ARM M4 processor
  • Water Resistant
  • Hand-picked combo for 4WD 1/10th scale surface applications running on 3s Lipo setups
  • Includes high performance and durability Spektrum Firma 3300kV Brushless motor
  • High current adjustable BEC (6v or 7.4v @ 4 Amps)
  • Compact for easy installation in most applications
  • Cooling fan




  • Adjustable Timing: No
  • Auto Cutoff: Yes
  • Low-Voltage Cutoff Programmable: Yes
  • Maximum Burst Current: 550A
  • Maximum Continuous Current: 33A
  • Input Voltage: 2-3S LiPo
  • Battery Input Lead: 12AWG 5.1" (130mm)
  • BEC: Yes
  • BEC Continous Current: 4A
  • BEC Maximum Burst Current: 8A
  • BEC Type: Switch Mode
  • BEC Voltage: 6V/7.4V
  • Brakes: Yes
  • Connector Type: IC3
  • Drive Type: Forward/Brake/Reverse
  • Time Delay Brake: Yes
  • Water-Resistant: Yes
  • Programmable: Yes


  • Motor Design: Inrunner
  • Motor Output Lead: 12AWG 5.1 in (130mm)
  • Motor Type: Brushless - Sensorless
  • Number of Poles: 4
  • Outer Diameter: 1.41" (36 mm)
  • Output: 430W(2S), 780W(3S)
  • Product Height: 1.3" (33 mm)
  • Product Length: 1.7" (43 mm)
  • Product Weight: 0.255
  • Product Width: 2.1" (53 mm)
  • RPM/Volt (Kv): 38,400 @ 12V
  • Shaft Extension Length: 15±0.5mm
  • Shaft Diameter: 3.175mm (0.125")
  • Technology: Smart
  • Wire Gauge: 12 AWG





(1) Spektrum Firma 85A Brushless ESC
(1) Spektrum Firma 3300KV Brushless Motor



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