KO Propo RSx4S-one10X

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Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	30148
Category	Hobby
Performance
Torque	7.4V 173.63 oz-in 6.0V 163.90 oz-in Above Average
Speed	7.4V 0.09 sec/60° 6.0V 0.10 sec/60° Average
Physical
Weight	1.78 ozAverage
Dimensions	L 1.594 in W 0.827 in H 1.024 in
Case Material	Aluminum / Plastic
Drivetrain
Motor Type	Coreless
Gears	Aluminum
Rotation/Support	Dual Bearings
Control & Signal
Control System	PWM
Programmable	Yes
Electrical & Environment
Operating Voltage	6–7.4 V
Power Source	LiPo / LiFe / Ni-MH
Connectivity
Wire Length	180 mm
Origin
Country of Origin	Japan

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Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Above Average Stronger than 67% of 177 Low Profile servos at 6.0V
Speed	Average Faster than 45% of 175 Low Profile servos at 6.0V
Weight	Average Lighter than 40% of 358 Low Profile servos

Performance Analysis

Shaft Power	3.03–3.57 W
Power Density	2.643 W/in³ More power-dense than 82% of 112 KO Propo servos
Torque Density	3.2455 oz-in/g Stronger than 51% of 38 KO Propo servos
Torque-to-Volume Ratio	121.42 oz-in/in³ Denser torque than 54% of 38 KO Propo servos
Speed-to-Weight	0.19802 (1/sec·g) Faster than 54% of 38 KO Propo servos
Speed-Torque Trade-off	16.39 Better balanced than 51% of 38 KO Propo servos
Torque Gain per Volt	4.24%/V More voltage-responsive (torque) than 7% of 29 KO Propo servos
Speed Gain per Volt	7.94%/V More voltage-responsive (speed) than 18% of 29 KO Propo servos
Voltage Range Width	1.4 V 1st-highest voltage range width of 38 KO Propo servos