HPI Racing SD-25MGWP

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Technical Specifications

Last Updated: 2026-10-24

Identity
Brand
Product Number	160546
Category	Hobby
Performance
Torque	7.4V 347.25 oz-in 6.0V 305.58 oz-in Above Average
Speed	7.4V 0.11 sec/60° 6.0V 0.13 sec/60° Average
Physical
Weight	2.61 ozBelow Average
Dimensions	L 1.575 in W 1.575 in H 0.787 in
Drivetrain
Gears	Metal
Gear Spline/Teeth	25 T
Control & Signal
Modulation	Digital
Electrical & Environment
Operating Voltage	6–7.4 V
Water Rating	Waterproof
Origin
Country of Origin	England

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*Based on known specs.

Class Comparison

Torque	Above Average Stronger than 69% of 1055 Digital Standard servos at 6.0V
Speed	Average Faster than 57% of 1038 Digital Standard servos at 6.0V
Weight	Below Average Lighter than 23% of 1872 Digital Standard servos

Performance Analysis

Shaft Power	4.35–5.84 W
Power Density	2.990 W/in³ More power-dense than 60% of 1762 Digital Standard servos
Torque Density	4.1295 oz-in/g Stronger than 64% of 1048 Digital Standard servos
Torque-to-Volume Ratio	156.53 oz-in/in³ Denser torque than 68% of 1053 Digital Standard servos
Speed-to-Weight	0.10395 (1/sec·g) Faster than 39% of 1031 Digital Standard servos
Speed-Torque Trade-off	39.73 Better balanced than 63% of 1029 Digital Standard servos
Torque Gain per Volt	9.74%/V More voltage-responsive (torque) than 17% of 868 Digital Standard servos
Speed Gain per Volt	13.00%/V More voltage-responsive (speed) than 35% of 868 Digital Standard servos
Voltage Range Width	1.4 V Wider voltage range than 30% of 1552 Digital Standard servos