Overview
Drop the center of gravity on your Traxxas TRX-4 dramatically with the Hot Racing CNC Solid Brass 76g Heavy Knuckle Weight Set. CNC-machined from solid brass billet, each knuckle weight adds a substantial 76g of mass to the steering knuckle — putting nearly 5 ounces of weight per side at the lowest possible point on the chassis. The result: a dramatically lower CG that transforms how the TRX-4 handles technical scale terrain.
Weight at the wheel level is the most effective way to lower a vehicle's center of gravity. Adding 76g per knuckle (152g per axle when used as a pair) creates a far more planted, stable, and capable scale crawler that climbs better, handles side-hills with confidence, and is far less likely to flip backwards on steep ascents.
Key Features
- CNC-machined solid brass billet construction
- 76g of weight added per knuckle
- Adds weight at the lowest point on the vehicle
- Aids climbing and reduces backwards flips on the front
- Fits factory plastic Traxxas 8251 portal housings
- Fits Hot Racing TRXF21C01 aluminum portal housings
Performance Benefits
- Dramatically lower center of gravity
- Significantly improved climbing performance
- Better side-hill stability and composure
- Reduced chance of flipping backwards on steep climbs
- More confident, planted feel on technical lines
Usage Notes
Can be used on the front (typical application for climbing performance) or the rear (for additional rear-end stability). For best balance, evaluate front vs. rear bias based on your driving style and terrain. Apply removable thread-locker on screws threading into metal. Direct fit on factory Traxxas 8251 plastic portal housings or Hot Racing TRXF21C01 aluminum portal housings.
Technical Specs
- Material: CNC-machined solid brass billet
- Weight: 76g each
- Function: Steering knuckle / axle housing weight
- Compatibility: Traxxas 8251 plastic outer portal housings, Hot Racing TRXF21C01 aluminum outer portal housings
What's Included
- Two (2) solid brass heavy knuckle weights
Fitment
Compatible RC vehicles: Traxxas TRX-4, Traxxas TRX-4 Sport, Traxxas TRX-6.
- Traxxas TRX-4
- Scale: 1:10
Summary
The Hot Racing CNC Solid Brass 76g Heavy Knuckle Weights are the right serious-tuner upgrade for any TRX-4 driver chasing maximum climbing performance and low-CG stability. Heavy, low, and exactly where you need the mass — a transformative chassis-tuning upgrade.
