KO Propo RSx4S-one10X Low Profile High Speed Brushless Servo

KO Propo RSx4S-one10X Low Profile High Speed Brushless Servo
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Price: $125.00

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The KO Propo RSx4S-one10X Low Profile High Speed Brushless Servo has been designed for extreme 1/10 Electric On Road, 1/10 Electric Off Road and 1/10 Gas On Road. With "4S" Serial connection combined with technology found in KO Propo's "Flection" Servo making for an easy to operate servo. The use of "4S" serial connection allows for a super fast and reliable signal to the receiver. To top it off, KO Propo added REAL TIME ICS support to allow setting changes to be made through the transmitter that support ICS. Using the "Flection" technology allows for a inertia focus that aids in smooth turning performance with less stalling while firmly gripping the road surface. Powering the servo is a coreless motor that was designed to lighten the load required from the car's BEC. This reduction in power draw will aid in preventing receiver brown out and increase reliability. Package includes one servo with grommets.


  • Hard anodized aluminum gears
  • Coreless motor
  • Five preset patterns are available
  • Aluminum center for head dissipation
  • Serial compatible
  • HCS compatible
  • Compatible with conventional PWN systems
  • Perfect for 1/10 EP on road


  • Voltage: 6.0-7.4V (LiPo, LiFe, NiMH)
  • Speed:
    • 6.0V: 0.10sec/60deg
    • 7.4V: 0.09sec/60deg
  • Torque: 
    • 6.0V: 163.87oz-in (11.8Kg-cm)
    • 7.4: 173.59oz-in (12.5Kg-cm)
  • Dimensions: 40.5×26×21mm (Low Profile)
  • Weight: 50.5g

This product was added to our catalog on September 3, 2021