SuperPro TRC6680 Steering Knuckle – Eliminate Bump Steer the Right Way

The SuperPro TRC6680 Steering Knuckle is the ultimate solution for bump steer issues affecting all 2019-onwards Isuzu D-Max, MU-X, and Mazda BT-50 models, delivering improved handling, tyre life, and alignment precision.
Isuzu and Mazda’s 2024 suspension update for the D-Max, MU-X, and BT-50 has only solved around 45% of the bump steer problem. That means drivers are still left dealing with:

Premature tyre wear
Inconsistent wheel alignment
Unstable handling, especially when lifted or loaded

The SuperPro TRC6680 steering knuckle and TRC6590 upper control arm are the complete fix—engineered to reduce bump steer by up to 95%, improving handling, alignment, and tyre life, whether your vehicle is at standard height or lifted.

Why TRC6680?

Fixes the real cause of bump steer by raising the steering rack pickup point—something upper control arms alone can’t do
Reduces tyre wear and improves contact with the road
Enhances driving stability, comfort, and safety
Suitable for standard and lifted vehicles
Direct OE-style fitment – no modifications required

Manufactured from hot-forged 4140 AISI steel, heat-treated and black e-coated for durability and corrosion resistance.

Legal & Fully Compliant

âœ… VSB14 Approved – No engineer sign-off or mod plate needed
âœ… ADR Compliant – Meets OE design standards
âœ… Tested to 1650kg front axle loads using FEA analysis
âœ… Suitable for use with any GVM upgrade
This product installs just like a control arm, spring, or shock—simple and legal.

Common Questions

Can wheel alignments fix bump steer?

No. Regular alignments might reduce tyre wear temporarily but don’t fix the core issue.

Can an upper control arm alone solve this?

No. It can help, but not enough. Designing a UCA to completely fix bump steer would create caster and clearance issues. That’s why steering knuckles are essential.

Why Bump Steer Matters

Bump steer causes your wheels to toe in or out as your suspension moves—especially with added weight or a lift kit. This leads to:

Tyres wearing out quickly
A steering wheel that constantly needs correcting
Fatigue from fighting the car’s handling

Proven, Tested, Trusted

The TRC6680 has been tested by SuperPro’s engineers and independent assessors to exceed strength and compliance standards. It’s built to perform and last.
Pair it with the TRC6590 upper control arm to fully restore proper geometry and feel the difference immediately.

Shipping & returns

We offer a flat-rate shipping fee Australia-wide, making it easy and affordable to get your gear delivered straight to your door. Every order is packed with care and shipped with trusted carriers to ensure safe and timely delivery.
You’ll receive tracking details once your order has been dispatched.

If you’re local, click & collect is also available from our workshop.

Payment options

At PCTA Offroad, we want upgrading your 4WD to be simple, flexible, and stress-free. That’s why we offer a range of convenient payment solutions both in-store and online, so you can gear up now and pay over time.

Afterpay

Split your purchase into four interest-free payments, paid every two weeks. No interest, no hidden fees—just choose Afterpay at checkout and you’re ready to go.

Humm

Perfect for bigger upgrades and full-vehicle builds. Humm offers flexible interest-free repayment plans that extend beyond Afterpay’s timeframe, allowing you to pay in smaller, more manageable slices.

PayPal Pay in 4

A fast and secure way to shop online. Divide your purchase into four interest-free payments through PayPal, giving you more control over your budget.

Our payment partners are trusted, secure, and designed to give you total peace of mind. If you have any questions or need help choosing the best option for you, our team is always here to assist.

All finance options are subject to approval and each provider’s terms and conditions. Be sure to review their requirements before completing your purchase.