At Ape Suspension, we see a broad cross section of suspension brands and systems, each designed to solve different problems for 4×4 owners. Among these, JMACX Offroad Solutions has carved out a reputation for providing highly engineered, compliance focused suspension upgrades, with particular strength in coil conversion systems and Gross Vehicle Mass (GVM) upgrades.


Engineering for Australian Conditions

Australia presents unique challenges for suspension systems. Extended distances, corrugated tracks, and towing requirements often push vehicles beyond their factory limits. JMACX’s products are developed with these factors in mind. Rather than simply reinforcing standard components, their systems are designed to fundamentally re-engineer the way vehicles handle loads, comfort, and off-road capability.

Coil Conversion Systems

Perhaps the best-known JMACX product is their coil conversion system, most often fitted to heavy-duty 4x4s such as the Toyota LandCruiser 70 Series and 200/300 Series. These conversions replace the vehicle’s factory rear leaf springs with a coil spring and trailing arm setup, bringing several benefits:

  • Ride Comfort – Coils generally provide a smoother ride compared to leaf springs, especially over corrugations and uneven terrain.
  • Load Stability – With carefully designed suspension geometry and stronger components, coil conversions improve the ability of vehicles to carry heavy loads consistently without excessive sag or instability.
  • Articulation – Trailing arms and coils allow more axle movement, improving traction in off-road conditions where wheel travel makes a significant difference.

These conversions are not just bolt-on kits. They require significant modification, including new crossmembers, control arms, mounts, and often upgraded shock absorbers to match. The end result is a system engineered for both compliance and durability, while giving vehicles that traditionally relied on leaf springs a higher level of ride and handling.


GVM Upgrades

Another cornerstone of JMACX’s offering is their range of GVM upgrades, which legally increase a vehicle’s maximum allowable weight. For many touring and work vehicles, factory GVM ratings quickly become restrictive once accessories like bull bars, winches, roof racks, and towing setups are added.

JMACX provides GVM upgrade kits for several popular models, including Toyota LandCruisers, Nissan Patrols, and other widely used heavy-duty 4x4s. The upgrades are often available at both federal level (for new vehicles prior to registration) and state level (for vehicles already registered). This ensures owners can remain compliant whether they’re modifying a new purchase or upgrading an existing vehicle.

Typical changes in a GVM upgrade package include:

  • Heavy-duty coil or leaf springs (depending on the vehicle and application).
  • Matched shock absorbers rated for higher loads.
  • Reinforced brackets, arms, and bushings to handle additional stress.
  • Engineering certification and compliance paperwork for legal recognition.

Depending on the model, a JMACX GVM upgrade can increase carrying capacity by several hundred kilograms, giving drivers greater flexibility for towing caravans, carrying work equipment, or preparing for long-haul touring.


Industry Position

JMACX is often seen as a brand that sits at the higher end of the suspension market, both in terms of engineering depth and cost. Their systems are more involved than a simple spring and shock upgrade, and they require proper installation and certification. For customers who need compliance and long-term durability, this makes them a respected choice. For drivers with lighter requirements, simpler suspension upgrades from other brands may still be more practical.

Summary

JMACX Offroad Solutions has built its reputation by focusing on engineering-heavy modifications such as coil conversions and GVM upgrades, rather than competing in the standard aftermarket spring and shock market. Their products are designed with Australian conditions in mind, targeting vehicles used for heavy towing, touring, and demanding off-road use. While not necessary for every 4×4 owner, JMACX plays an important role for those who need advanced, compliant solutions that go beyond the capabilities of standard suspension systems.