RX4 Element Proof Crawler ESC

(3 reviews) Write a Review
Maximum Purchase:
4 units

Tekin’s RX4 Brushless Sensored ESC is designed to power your chassis past any obstacle. With massive power handling capabilities, a waterproof* design and all the customization features you’d expect from a Tekin ESC; the RX4 has you covered no matter the situation. Not only reliable, this ESC has a host of built in features like a High Voltage BEC, Drag Brake, Data Logging, Voltage Cutoffs for LiPos, HotWire 3.0 Bluetooth Connectivity and the ability to run either Brushed or Brushless motors. The RX4 defines versatility.

The RX4 Housing is a thick-walled, reinforced Hardbox design able to withstand the elements and rough environments that come with true Offroad adventuring.

Rocks, Dirt, Snow, Sand, Mud, Trail and Track; the RX4 is no-limits RC fun.


HardBox Waterproof Design *
Multi-Fin High Efficiency Heat Sink and Optional High RPM Cooling Fan
QuickTune™ One Touch Programming
Adjustable Torque Control ***
Adjustable Throttle and Brake Frequencies ***
HD High Voltage Programmable BEC ***
HotWire™ Programming Port ***
Data Logging Capability ***
Sensor Checker
One-Touch Radio Calibration
On-Board Temperature Indicator
ESC Self Diagnostics with Error Codes
Fully Proportional Forward/Brake/Reverse
D2: Dual Drive Mode Technology
Brushless and Brushed Motor Drive
Sensored or Sensorless Operation
LiPo Safe with Custom Voltage Cutoffs
Sensor Plug for Precise Commutation
HDAC: High Density Copper PCB's
Ultra-smooth and Precise Throttle and Braking Control

* Waterproof in sensorless operation only. Element Proof ESCs and Motors are specially designed to withstand water splashes and are not meant to be submerged. Included dielectric grease must be used on the sensor connections to protect them from shorting.

**The RX4 is not intended for operation while submerged in liquid.

*** requires HotWire™ sold separately.



Controls Forward/Brake/Reverse
Drag Brake via Aux. Channel
Input Voltage 2S-6S LiPo/LiHV
Motor Limit Brushless Mode
540 and 550 Size Cans
2S - 5700KV 4 Pole
3S - 3500KV 4 Pole
4S - 2300KV 4 Pole
5S - 1800KV 4 Pole
6S - 1200KV 4 Pole
Motor Limit Brushed Mode
540 and 550 Sized Cans
No Limit
MAX Current 240A per phase*
BEC Current 8A
BEC Voltage 6.0-7.4V
Dimensions 40.6 x 50.8 x 35.5mm
1.6 x 2.0 x 1.4in
Weight 75.5g
Fan Size 25mm



TEKIN, INC. guarantees speed controllers to be free from factory defects in materials and workmanship for a period of 180 days from date of purchase, when verified by sales receipt. This warranty does not cover: suitability for specific application, components worn by use or improper voltage, tampering, misuse, abuse or shipping. Our warranty liability shall be limited to repairing or replacing unit to our original specifications. Because we have no control over the installation or use of this product, in no case shall we be liable for damages. ESCs used for Drag Racing are guaranteed to be free of defects upon purchase. Due to the nature of Drag Racing, ESCs installed and used in a Drag Racing application are exempt from any warranty.

3 Reviews Hide Reviews Show Reviews

  • 5
    RX4 ESC

    Posted by Mark Crowell on Dec 10th 2022

    All my items came in a very timely manner. They were also very well packaged for shipment. I bought these items for the VS4-10 I'm building just trying to get all the parts for the build together before I start. These Tekin Products appear to be top quality and I am looking forward using them in my build and in the future.

  • 5

    Posted by Mark Garner on Mar 18th 2021

    Two years running strong!!!

  • 5

    Posted by MATTHEW Nall on Dec 18th 2020

    I installed the RX4 on my Axial Umg10 6x6 scx10 II, it fits and performs amazing! Lots of adjustment options paired with the Hotwire 3.0. I can adjust setting from my phone! Very awesome ESC!