Parts/Suspension & steering/Suspension arms & hubs/Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4 (2) (239g) w/Scale Brake Rotor
Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4 (2) (239g) w/Scale Brake Rotor
Samix

Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4 (2) (239g) w/Scale Brake Rotor

Part # SAMTRX4-4412-C45.0(20)
Where to buy
$159.99
AMain Hobbies
Seen Oct 12, 2026
$159.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

The Samix Traxxas TRX-4 Brass Steering Knuckle, C-Hub, Portal Cover & Scale Brake Rotor Set combines the Samix TRX-4 Knuckle (SAMTRX4-4412), C-Hub (SAMTRX4-4014) and the Portal Cover/Rotor Set (SAMTRX4-4413C2), and saves you money compared to buying the items separately! Plus, the kit adds 239 grams of unsprung weight to the front of your TRX-4, for improved forward weight bias and performance. Unlike other brass parts, these feature a stealthy black finish, with chamfered edges that give the parts an unmatched look that offers a touch of bling to your scaler. 

  

Features:
  • Brass knuckle adds 102g a pair
  • Brass portal knuckle cover adds 55g a pair
  • Brass c-hub Adds 82g a pair
  • Better center or gravity and forward weight bias for climbing
  • Improved durability and rigidity over the factory parts
  • Made of high quality brass and etched with L and R for ease of installation
  • Compatible with Traxxas parts
  • Black coating to help prevent corrosion
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews5.0 · 20 reviews

Casey JamesVerified owneron Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4

These things are awesome! All pieces are a perfect fit to the stock axles and they look great. I myself don't want my TRX-4 Blazer covered in a bunch of brass color and instead I got these for the additional weight as well as the look. The only thing I noticed with these is you also need to buy the Samix TRX-4 Brass 12mm Hex Adapter (4) (+8mm Offset) in order to make the brake rotors fit without hitting the wheel wells. No problem though, I got them and these things look amazing as well as make a huge difference in crawling around.

4 found this helpful
KVVerified owneron Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4

A must have for your TRX-4. Will greatly lower your center of gravity and help crawl and climb massively, while still maintaining a scale look, And after a year of good solid use they continue to operate flawlessly.

1 found this helpful
Gabriel NagtalonVerified owneron Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4

Aloha kakou! Looking for brass components for your TRX4? Look no further, Samix makes a variety of brass components to keep your TRX4 planted to the ground. I am currently going all brass in the chassis so these brass steering knuckle, C-Hub, Portal Cover & Scale Brake Rotor set came in clutch in keeping my front end weighted. The Scale Brake Rotor was such a cool touch to the scale look! Pricing is a little bit much but if you compare what you get from Samix over Amazon, I prefer quality over quantity. Now if your in between brands such as Yeah Racing's set over these Samix set, then your like me where I couldn't decide but because I like the black coating with sanded lining to show a little brass around the edges then the Samix is the way to go. Yeah Racing's set is also just a bit more. So more bang for your buck with these Samix. Still waiting for the brass steering bushing though... Mahalo nui loa Samix for making great products!

1 found this helpful
Jason BouchardVerified owneron Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4

Fast... Exactly what i wanted. Will order from amain again

Yi Chen HsiehVerified owneron Samix Brass Steering Knuckles, C-Hubs & Outer Portal Covers for Traxxas TRX-4

Very nice quality. Good looking as on the pictures, but a little pricy.

What reviewers say

Reviewers of the Samix brass steering knuckles, C-hubs and portal covers for the TRX-4 (239g set with scale brake rotor) generally report good machining, a clean fit and a finish they find attractive. Many say the added front unsprung weight improves planting and stability on inclines and rocky terrain. Several note the set requires the Samix 12mm hex adapter with 8mm offset so the brake rotors clear the wheel wells. Price is described as high by some. One reviewer reported a left knuckle that was not drilled properly, which made installation harder, though it was eventually fitted. One reviewer noted the added weight could be a disadvantage on wet or slippery surfaces. Most reviews are from verified owners, several on Bronco variants, and the sample is small.

  • + Precise machining and good fit
  • + Attractive finish and scale look
  • + Adds front unsprung weight and stability
  • + Easy installation for most owners
  • − Requires 12mm hex adapter for brake rotor clearance
  • − Relatively high price
  • − One knuckle reported improperly drilled
  • − Added weight may hinder wet or slippery crawling
Summary generated from the reviews above.

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