Parts/Landcraft/Drivetrain/Axles & axle parts/Samix Brass Portal Covers for Traxxas TRX-4 (2) (27.5g) w/Scale Brake Rotors
Samix Brass Portal Covers for Traxxas TRX-4 (2) (27.5g) w/Scale Brake Rotors
Samix

Samix Brass Portal Covers for Traxxas TRX-4 (2) (27.5g) w/Scale Brake Rotors

Part # SAMTRX4-4413C25.0(3)
Where to buy
$46.99
AMain Hobbies
Seen Oct 12, 2026
$46.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

The Samix Traxxas TRX-4 Brass Portal Cover & Scale Brake Rotor Set is a precision machined portal cover that adds 55 grams of unsprung weight to the front or rear 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.

Plus, when combined with the Samix steering knuckles (SAMTRX4-4412 - not included) and 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 portal knuckle cover adds 55g a pair
  • Improve climbing performance and stability with lower CG
  • Machined from high quality brass material
  • Black finish to help avoid oxidation
  • Includes SAMIX 36mm scale brake rotor & caliper for improved scale looks
  • More rigid and increased durability
  • Direct fit on TRX-4 front & rear std knuckle and SAMIX alum. or brass option knuckle 

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

Roman PfannerVerified owneron Samix Brass Portal Covers for Traxxas TRX-4

Fit perfectly front and rear and mated up without issue to the stock Traxxas plastic portal housing. Looks great and keeps from adding TOO MUCH weight to keep the rear end of your crawler light! Really like them overall!

Pete DeVrieson Samix Brass Portal Covers for Traxxas TRX-4

I added these along with every other brass part that Samix makes for both the front and rear axles of my TRX4, and along with a set of Yeah Racing alloy axles and brass diff covers, there is no plastic remaining on my rigs axles. The improvement in performance and appearance is huge. Adding as much weight down low makes the biggest difference for crawlers. I also add several ounces of stick on lead weights to the inside of each wheel before i mount the tires which also helps a ton... Great product! I have a ton of Samix parts and the quality is top notch!

KVVerified owneron Samix Brass Portal Covers for Traxxas TRX-4

Another must have, especially with a lot of brass up front on your truck. Will keep the rear end planted on decents. After a year of good solid use they continue to perform like new.

What reviewers say

Three reviewers rated these brass portal covers 5/5. Reviewers report they fit the stock Traxxas plastic portal housing front and rear without issues. They value the added weight low on the axle, which one says helps crawling stability and keeping the rear planted on descents. One reviewer reports a year of use with no visible performance decline. One reviewer used them alongside other Samix brass parts and Yeah Racing components, reporting a large performance and appearance gain, though that gain cannot be attributed to these covers alone. No recurring problems or complaints appear in the reviews.

  • + Fits stock portal housing
  • + Adds weight low on axle
  • + Durable after a year of use
  • + Improves rear planting on descents
Summary generated from the reviews above.

Builds using this part

No builds use this part yet — add it to yours from the build editor.