Overview
Add precise low-mounted weight to your Traxxas TRX-4 with the Hot Racing CNC Solid Brass 47g Modular Add-On Inner Knuckle Weight. CNC-machined from solid brass billet, this 47g per-knuckle weight is designed as a direct-fit add-on for the Hot Racing TRXF21HE Modular Brass Outer Portal Drive Housing — putting massive low-mounted mass exactly where the TRX-4 needs it most.
Lower center of gravity equals more confident climbing, better side-hill stability, and a dramatically reduced chance of flipping backwards on steep ascents. Each weight adds 47g per hub for a total of 94g of front-end weight when used as a pair — a serious chassis-tuning move that transforms how the TRX-4 handles technical scale terrain.
Key Features
- CNC-machined solid brass billet construction
- Direct-fit modular add-on for Hot Racing TRXF21HE
- 47g per-knuckle weight addition
- Lowers center of gravity for improved stability
- Set of two — covers both front knuckles
Performance Benefits
- Significantly improved climbing performance
- Better side-hill stability and composure
- Reduced chance of flipping backwards on steep climbs
- More planted, confident overall handling
- Lowest-possible center of gravity at the wheel level
Usage Notes
Requires the Hot Racing TRXF21HE Modular Brass Outer Portal Drive Housing for installation — these inner knuckle weights are designed as add-ons specifically for that housing system. Apply removable thread-locker on screws threading into metal during installation.
Technical Specs
- Material: CNC-machined solid brass billet
- Weight: 47g each
- Outside Diameter: 49mm
- Function: Inner knuckle add-on weight
- Compatibility: Hot Racing TRXF21HE Modular Brass Outer Portal Drive Housing
What's Included
- Two (2) solid brass inner knuckle add-on weights
Fitment
- Traxxas TRX-4 (1/10 scale)
- Requires Hot Racing TRXF21HE Modular Brass Outer Portal Drive Housing
- Front knuckles (typical application for climbing)
Summary
The Hot Racing CNC Solid Brass 47g Modular Inner Knuckle Weight is one of the most effective low-CG upgrades for any TRX-4 equipped with the TRXF21HE modular portal housing. Bolt them on for serious climbing performance and chassis stability gains.
