TUBULAR TRAILING ARMS- Lower - VB-VS
Adjustable Chromoly Lower Trailing Arms – VB–VS Live Axle
Designed to install into the factory lower trailing-arm mounting locations on VB–VS live-axle Commodores, these adjustable arms replace the factory pressed-steel units with a substantially stronger chromoly design.
Factory lower trailing arms can flex or bend under heavy loads such as hard launches, aggressive cornering and motorsport use.
Our current-generation lower arms use a large-diameter chromoly main tube with a straight-load-path design, developed following extensive real-world use and testing to significantly increase strength and resistance to bending over our previous design. The straight-tube layout also provides excellent clearance for wide tyres and shortened-diff applications.
This Listing Includes
• 1 x pair of adjustable chromoly lower trailing arms
• Choice of polyurethane-bushed or Heim-joint configuration
Available Options
Polyurethane Bush
The polyurethane-bushed option is intended primarily for standard-horsepower and very mild street applications where some additional suspension compliance is preferred.
As power, tyre grip and vehicle abuse increase, the polyurethane bush material itself becomes the limiting component and will generally not tolerate repeated high-load use as well as the Heim-joint option.
For vehicles making meaningful increases in power, seeing regular hard launches, drag-strip use or other high-load driving, we recommend the Heim-joint configuration.
Kevlar / Teflon-Lined Chromoly Heim Joint
Our current Heim-joint option uses a premium Kevlar / Teflon-lined chromoly joint designed for long service life and high-load performance applications.
Modern lined Heim joints are very different from the older unlined metal-on-metal race-style Rose joints that developed a reputation for knocking, rattling and excessive road noise. The liner provides a much smoother and quieter joint while also significantly improving wear life.
When correctly installed, maintained and kept free from damage, these joints can provide many years of service while handling substantially higher loads than the polyurethane-bushed option.
For most modified, high-performance and motorsport vehicles, the Heim-joint option is our recommended configuration.
⚠️ Important Ride-Height Information
These arms install into the factory lower trailing-arm mounting locations; however, they are not a factory-geometry reproduction and are not guaranteed to retain the vehicle’s existing rear ride height.
The current straight-tube design differs from both the factory pressed-steel arm and our previous bent-tube version. Because of this revised geometry, the installed spring position and resulting rear ride height may change.
In some vehicles, the rear ride height may increase after installation. The amount will vary depending on the vehicle, springs and overall suspension setup.
Customers wanting to maintain a specific rear ride height must allow for the possibility of changing the rear springs after installation.
Do not purchase these arms on the assumption that your existing springs will produce exactly the same ride height once the arms are fitted.
The straight-tube construction is an intentional design choice. Adding a bend or additional drop into the main tube solely to reproduce the factory spring position would compromise the strength advantage that the current design is intended to provide.
Key Details
• Suits VB, VC, VH, VK, VL, VN, VP, VR and VS live-axle Commodores
• Does not suit IRS models
• Adjustable tubular chromoly construction
• Current-generation large-diameter straight-load-path lower-arm design
• Developed through extensive real-world use and testing
• Designed to minimise flex and bending under high load
• Polyurethane bushes intended primarily for standard-horsepower and very mild street applications
• Premium Kevlar / Teflon-lined chromoly Heim joints recommended for modified, high-performance and motorsport applications
• Suitable for wide-tyre and shortened-diff applications
• Installs into the factory lower trailing-arm mounting locations
• Professional installation required
• These arms are not designed or advertised as a lowering component
Installation Notes
Installation must be carried out by a suitably qualified and experienced professional.
After installation, rear axle alignment, wheelbase, suspension travel and all surrounding clearances must be checked before the vehicle is driven.
Final ride height should only be assessed with the vehicle:
• On level ground
• Under its normal operating load
• With the tyres correctly inflated
• After the suspension has been properly settled
For the most accurate comparison, measure from the centre of the rear wheel to the guard lip, rather than from the ground to the body.
Lead Time
Most Showtime Customs & Fabrication products are manufactured to order.
Products may appear available online; however, please allow up to 4 weeks for production before shipping, unless otherwise stated.
For time-sensitive orders, please email us before purchasing:
online@showtimecustoms.com.au
🚚 Shipping & Pickup Policy
Showtime Customs & Fabrication is a manufacture-to-order workshop rather than a retail storefront.
To keep production efficient and orders moving, we operate as a shipping-only facility. Completed and fully paid orders are dispatched via courier.
We do not offer on-site pickup or walk-in sales.
Disclaimer
All products supplied by Showtime Customs & Fabrication must be installed by a qualified professional. Regular inspection and maintenance are the responsibility of the end user.
Unless otherwise stated, suspension, steering, brake and related performance components are intended for off-road, motorsport or show use. Showtime Customs & Fabrication accepts no liability for damage, injury or loss resulting from incorrect installation, misuse, lack of maintenance or failure of associated components.