---
product_id: 275166002
title: "Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01, Black"
brand: "spektrum"
price: "€ 230.02"
currency: EUR
in_stock: true
reviews_count: 11
category: "Spektrum"
url: https://www.desertcart.hr/products/275166002-spektrum-firma-85a-brushless-smart-esc-3300kv-sensorless-motor-combo
store_origin: HR
region: Croatia
---

# 85A Smart ESC current 3300Kv high-speed motor Sensorless tech, easy upgrade Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01, Black

**Brand:** spektrum
**Price:** € 230.02
**Availability:** ✅ In Stock

## Summary

> ⚡ Unleash the speed demon in your RC with Spektrum’s smart power combo!

## Quick Answers

- **What is this?** Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01, Black by spektrum
- **How much does it cost?** € 230.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/275166002-spektrum-firma-85a-brushless-smart-esc-3300kv-sensorless-motor-combo)

## Best For

- spektrum enthusiasts

## Why This Product

- Trusted spektrum brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quick & Easy Upgrade:** Fits popular RC models with minimal modifications—upgrade your ride in under 20 minutes.
- • **Smart Sensorless Tech:** Simplifies installation and maintenance with reliable, sensorless motor design.
- • **Power-Packed Performance:** 85A ESC delivers consistent, high-current power for aggressive driving.
- • **Blazing Fast 3300Kv Motor:** Experience rapid acceleration and top speeds up to 47 mph on 3S batteries.
- • **Seamless Battery Compatibility:** Supports up to 3S LiPo batteries with IC3 connector for versatile power options.

## Overview

The Spektrum Firma 85A Brushless Smart ESC paired with a 3300Kv sensorless motor combo offers a high-performance upgrade for RC vehicles, supporting up to 3S LiPo batteries. Designed for easy installation and enhanced durability, it delivers speeds up to 47 mph, making it a top choice for serious hobbyists seeking reliable power and smart integration.

## Description

Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01

Review: Fits inside an Associated Pro4 SC10 - This combo was a great upgrade from the Reedy system that this truck came with. I'm running 3s 120c batteries and WOW! Unless I'm letting someone with less RC experience take her for a spin, then I run a 2s. But even then...she quick! As you can see, I have a fan on there that does a great job keeping this motor cool when pushing this truck thru grass. I'm not a fan of running thru puddles but that said grass is wet this time of year and I'm not having any troubles with moisture (yet). I also take the hose to it after a day of racing around the yard. Unfortunately there are not way to screw the ESC into place so the provided double sided tape has worked out great. Stayed put even after landing on it's top side a few times at the local bmx track. 10/10 would buy again...in fact, I think I'll get one for my Traxxas Slash as soon as I'm done here. I'm not happy with the budget combo I got from here (desertcart, not talking about this seller).
Review: Rustler 2wd Upgrade - Bought this to upgrade an old rustler. It was getting time to start replacing batteries and my main is a 4s Outcast v2 so I wanted to battery share. I figured it'd be more beneficial/cost effective if I run them off the same ESCs so they can battery share (this combo is UP TO 3s) and since I have so much into the spektrum ecosystem, I'll merge where I can. You'll need to reverse the motor for 2wd and you'll want to adjust the punch. You can keep all the traxxas parts. Drilling 2 holes on the ESC mount and using a longer screw for the receiver box to mount the button is all I did to mount the ESC to a stock rustler (if your batteries are thick, you can use collars and longer screws to lift the ESC mount for clearance; I also replaced the battery tie down nuts for velcro so i can use 3s hardcase G2s). For the new motor, transmission is stock so I did upgrade the spur/pinion to a metal 86/21 for the extra power the motor produces. The stock is fine if you just want to upgrade cheaply but I'd imagine it would not last long on 3s 100c because stock is plastic, so keep that in mind for spares. This ESC has an IC3 connector so if you have IC5/EC5 batteries you'll need an adapter (if you want to benefit from their smart batteries you need the smart extension). All-in-all, this was a great upgrade and the 3300kv motor is good power for the rustler platform. Without much tweaking, it was hitting between 42-47 mph with more to go. If you're stock, you definitely need to upgrade the rear wheels. Update 25 Feb 2024: Took it out for an extended run and decided to adjust the punch to 6 (from the factory 5) WOW did that make a huge difference. This thing is a rocket with punch 6 using a 3s 5000mAh 100c battery (G2). I had to adjust the wheelie bar to the lowest setting to keep it from flipping or start walking. Upgrading the shocks to something with a quicker return might help keep the front end down but I was able to feather the speed to ramp it up. What an amazing upgrade and took less than 20min to upgrade. Definitely recommend Final Update: With all that torque, had to replace driveshafts (factory) as it twisted them in two. Took that time to upgrade the turnbuckles, wheelie bar (to the better metal wheels), and added a can fan. This thing is a rocket but to add any more speed it'll need to be weighted for speed runs.

## Features

- Spektrum Firma 85A Brushless Smart Esc / 3300Kv Sensorless Motor Combo, Spmxsemc01
- Brand: Spektrum
- Package Height: 6.36 Inches
- Item Package Weight: 0.44 Pounds

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08T5VCKY1 |
| Best Sellers Rank | #64,377 in Toys & Games ( See Top 100 in Toys & Games ) #26 in Radio Control Vehicle Speed Controls |
| Brand | Spektrum |
| Customer Reviews | 4.6 4.6 out of 5 stars (498) |
| Item Weight | 1.03 pounds |
| Item model number | SPMXSEMC01 |
| Manufacturer | Spektrum |
| Manufacturer recommended age | 14 years and up |
| Material | Plastic |
| Model Name | Brushless Smart ESC / 3300Kv Sensorless Motor Combo |
| Product Dimensions | 6.9 x 5.2 x 2.1 inches |
| Release date | January 15, 2021 |
| Speed | 1550 RPM |
| UPC | 605482692387 |
| Voltage | 3 Volts |

## Product Details

- **Brand:** Spektrum
- **Material:** Plastic
- **Model Name:** Brushless Smart ESC / 3300Kv Sensorless Motor Combo
- **Speed:** 1550 RPM
- **Voltage:** 3 Volts

## Images

![Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01, Black - Image 1](https://m.media-amazon.com/images/I/71-1JEyLUoL.jpg)

## Questions & Answers

**Q: Does it have a on and off switch ?**
A: Yessir, just hold the button for a sec an it turns back off.

**Q: Does this have a 5 mm motor shaft?**
A: No. I purchased a 5mm spur because of this incorrect answer. The motor shaft is 1/8” and or 3.175mm.

**Q: What scale is this combo recommended for?**
A: This combo is for 4WD 1/10th scale surface applications running on 3s Lipo setups

**Q: Can you run 2s on this set up?**
A: Yes this works on 2s

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits inside an Associated Pro4 SC10
*by J***E on January 3, 2024*

This combo was a great upgrade from the Reedy system that this truck came with. I'm running 3s 120c batteries and WOW! Unless I'm letting someone with less RC experience take her for a spin, then I run a 2s. But even then...she quick! As you can see, I have a fan on there that does a great job keeping this motor cool when pushing this truck thru grass. I'm not a fan of running thru puddles but that said grass is wet this time of year and I'm not having any troubles with moisture (yet). I also take the hose to it after a day of racing around the yard. Unfortunately there are not way to screw the ESC into place so the provided double sided tape has worked out great. Stayed put even after landing on it's top side a few times at the local bmx track. 10/10 would buy again...in fact, I think I'll get one for my Traxxas Slash as soon as I'm done here. I'm not happy with the budget combo I got from here (Amazon, not talking about this seller).

### ⭐⭐⭐⭐⭐ Rustler 2wd Upgrade
*by E***E on February 24, 2024*

Bought this to upgrade an old rustler. It was getting time to start replacing batteries and my main is a 4s Outcast v2 so I wanted to battery share. I figured it'd be more beneficial/cost effective if I run them off the same ESCs so they can battery share (this combo is UP TO 3s) and since I have so much into the spektrum ecosystem, I'll merge where I can. You'll need to reverse the motor for 2wd and you'll want to adjust the punch. You can keep all the traxxas parts. Drilling 2 holes on the ESC mount and using a longer screw for the receiver box to mount the button is all I did to mount the ESC to a stock rustler (if your batteries are thick, you can use collars and longer screws to lift the ESC mount for clearance; I also replaced the battery tie down nuts for velcro so i can use 3s hardcase G2s). For the new motor, transmission is stock so I did upgrade the spur/pinion to a metal 86/21 for the extra power the motor produces. The stock is fine if you just want to upgrade cheaply but I'd imagine it would not last long on 3s 100c because stock is plastic, so keep that in mind for spares. This ESC has an IC3 connector so if you have IC5/EC5 batteries you'll need an adapter (if you want to benefit from their smart batteries you need the smart extension). All-in-all, this was a great upgrade and the 3300kv motor is good power for the rustler platform. Without much tweaking, it was hitting between 42-47 mph with more to go. If you're stock, you definitely need to upgrade the rear wheels. Update 25 Feb 2024: Took it out for an extended run and decided to adjust the punch to 6 (from the factory 5) WOW did that make a huge difference. This thing is a rocket with punch 6 using a 3s 5000mAh 100c battery (G2). I had to adjust the wheelie bar to the lowest setting to keep it from flipping or start walking. Upgrading the shocks to something with a quicker return might help keep the front end down but I was able to feather the speed to ramp it up. What an amazing upgrade and took less than 20min to upgrade. Definitely recommend Final Update: With all that torque, had to replace driveshafts (factory) as it twisted them in two. Took that time to upgrade the turnbuckles, wheelie bar (to the better metal wheels), and added a can fan. This thing is a rocket but to add any more speed it'll need to be weighted for speed runs.

### ⭐⭐⭐⭐⭐ Good upgrade for Arrma Granite Voltage 2wd, Some Modification require for the motor!
*by R***S on May 4, 2024*

I purchased this combo for my son's Arrma Granite Voltage 2wd Basher. It's a great product, and I love the Spectrum Smart batteries and many of their products I've also purchased. We use a Spectrum 5000mah 2s lipo battery for this setup, and it keeps temps down enough, and I didn't have to change out any gearing. Due to the placement of the wiring coming off the motor, I did have to do some modification to the plastic frame of the Voltage with a Dremmel to get the motor to fit properly. The Voltage is a hard RC basher to upgrade, as the frame is so small, and congested, I'd recommend not going down this rabbit hole, and instead upgrade it to a more power brushed motor. I've easily spent more money trying to upgrade this basher than I should have, and could have easily purchased a better Basher all together. But if, like me, you love to tinker and upgrade, this is a good place to start for brushless. There are many items you'll have to upgrade on this truck also, and the tires absolutely have to be one of them, as the stock tires cannot grip anything, especially with a brushless motor. The rear differential is also a necessary item, as the plastic factory cups break off quickly. Anything you can upgrade to metal that has to do with the gearing, steering or wheels, you'll want to do. As these parts don't last long. In some items though it's best to keep plastic, as they are able to bend and come back into place without breaking.

## Frequently Bought Together

- Spektrum Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo, SPMXSEMC01
- HOOVO RC Battery 2S LiPo Battery 7.4V 5200mAh 80C Hard Case with Deans Plug Battery Replacement Battery for RC Car Truck Heli Aeroplane Rock Crawler Aeroplane Helicopter RC Car Truck Boat (2 Packs)
- DUMBORC RC Transmitter and Receiver 2.4ghz 4CH Radio remote controller for RC Car Boat Truck

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/275166002-spektrum-firma-85a-brushless-smart-esc-3300kv-sensorless-motor-combo](https://www.desertcart.hr/products/275166002-spektrum-firma-85a-brushless-smart-esc-3300kv-sensorless-motor-combo)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-15*