Parts/Suspension & steering/Suspension arms & hubs/Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4 (2) (167g) w/Scale Brake Rotors
Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4 (2) (167g) w/Scale Brake Rotors
Samix

Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4 (2) (167g) w/Scale Brake Rotors

Part # SAMTRX4-4412C35.0(3)
Where to buy
$105.99
AMain Hobbies
Seen Oct 12, 2026
$105.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

The Samix Traxxas TRX-4 Brass Steering Knuckle, Portal Cover & Scale Brake Rotor Set combines the Samix TRX-4 Knuckle (SAMTRX4-4412) and the Portal Cover/Rotor Set (SAMTRX4-4413C2), and saves you money compared to buying the items separately! Plus, the kit adds 167 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. 

When combined with the Samix brass c-hubs (SAMTRX4-4014 - not included) you have the ultimate brass upgrade package that will dramatically improve the performance of your TRX-4

  

Features:
  • Brass knuckle adds 51g per side (102g per pair)
  • Brass portal knuckle cover adds 55g 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

NOTE: The brake rotor is suitable for the standard TRX-4 wheel, and will clear any wheel with greater than 36mm inner diameter but may require wider hubs. 

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 · 3 reviews

Todd NewhallVerified owneron Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4

The tolerances is great,fit and finish is actually better quality than Treal.Very pleased with Samix!

Jake WillsVerified owneron Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4

The product is great but what really stands out is the customer service. I ordered some fenders for my Trx and I ordered wide ones. And I message them and say can I have the narrow ones instead. And I get a message back saying hey sorry they already shipped but here is a credit for them so you can have them for free!

Pete DeVrieson Samix Brass Steering Knuckles & Inner Portal Covers for Traxxas TRX-4

Awesome set. Great quality and performance upgrade!

What reviewers say

Three reviewers rate the Samix brass steering knuckles and inner portal covers for the Traxxas TRX-4 at 5/5. Reviewers describe the fit, finish and tolerances as good, with one stating the finish is better than that of Treal parts. One reviewer praised the product's quality and performance upgrade. A separate reviewer praised the seller's customer service after a wrong-size fender order was resolved with a credit. Reviews are few and short, and none mention problems or drawbacks.

  • + Good tolerances and fit
  • + Fit and finish compared favourably to Treal
  • + Strong quality and performance upgrade
  • + Responsive customer service
Summary generated from the reviews above.

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