Description
Ultimate RSX8 1/8 Brushless Servo 37kg / 0.075s with UR1815-25 Servo Horn (Unthreaded) – UR4701-T2
The Ultimate Racing RSX8 Brushless Servo is engineered for 1/8 scale competitive RC cars, delivering up to 37 kg of torque and a lightning-fast 0.075s response time. This version includes the UR1815-25 unthreaded 25T servo horn, ready for throttle/brake or steering use.
It features a black anodized top case and red bottom cover, both CNC-machined with cooling grooves to reduce heat and weight. The repositioned O-ring sealing around screw holes improves moisture protection.
Included in the box:
- UR1815-25 25T servo horn (unthreaded)
 - 4 x M3x14 mm countersunk screws (no washers needed)
 - 2 x flat rubber vibration-isolation pads
 - M3 cap screw for mounting the horn
 - EVA Ultimate Racing box – reusable
 
Specifications:
- Type: Digital, brushless
 - Bearings: Dual ball bearing
 - Gears: Titanium & steel
 - Voltage: 6.0 – 8.4V
 - Speed: 0.10s (6V), 0.08s (7.4V), 0.075s (8.4V)
 - Torque: 31kg·cm (6V), 35kg·cm (7.4V), 37kg·cm (8.4V)
 - Size: 40 x 20 x 38 mm
 - Weight: 81g
 - Cable: 300 mm, JR connector
 
Highlights:
- High-voltage compatible for 1/8 RC racing
 - Ultra-fast and powerful for precision control
 - CNC aluminum case with advanced heat dissipation
 - Moisture-resistant and vibration-dampened installation
 - Complete with servo horn and mounting hardware
 





