Mitsubishi Triton 4WD (2006-2015) ML; MN (TO MY15) 7/2006-2015 Tough Dog FS122L Tough Dog Rear Leaf Spring
TD-FS122L

Leaf springs represent one of the most enduring suspension designs in automotive engineering, maintaining their relevance particularly in commercial vehicles due to their exceptional load-bearing capabilities.

Engineered in Australia, Tough Dog progressive rate leaf springs incorporate a sophisticated design featuring both primary and secondary stage leaves. This dual-stage configuration ensures that the vehicle's ride quality remains uncompromised under varying load conditions. As the spring compresses, the secondary stage engages to mitigate excessive sag, thereby enhancing overall performance.

The manufacturing process of these leaf springs is meticulously executed to guarantee maximum durability, corrosion resistance, and sag prevention. Tough Dog provides a selection of up to three spring rate options for most applications, allowing for tailored solutions that best fit your vehicle's specific setup.

Each spring is precision mandrel and die-formed, oil quenched, hardened, and tempered to ensure longevity and resilience. A military wrap is standard across all part numbers, and the springs are accurately heat-treated to optimize performance. Constructed from high-grade spring steel, these leaf springs also feature anti-friction pads in most applications, and are pre-stressed to maintain optimal ride height.

Load rate testing is conducted to ensure that the springs meet rigorous performance standards. If your vehicle is equipped with additional accessories, Tough Dog offers various spring rates to accommodate constant load carrying. The approximate raised height provided by these springs ranges from 20-25mm, with specific models designed for different load capacities: FS122C for 0-300kg light load, FS122L for 300kg constant load, and FS122LL for 500kg constant load.

It is advisable to pair these raised springs with long travel shock absorbers to achieve the best performance. Constant load refers to weight that is permanently added to the vehicle, such as fixed accessories like canopies, steel trays, draw systems, fridges, toolboxes, rear bars, or spare wheel carriers. Selecting the appropriate spring rate is crucial for optimizing load carrying capacity, ride quality, and ride height.

Please note that images provided are for representation purposes only and may not accurately depict the specific part number you are viewing.

Features of Tough Dog Leaf Springs

• Designed in Australia
• Progressive rate leaf springs
• Primary and secondary stage leaves
• Prevents excessive sag under load
• Maximum life and corrosion protection
• Up to 3 spring rate options
• Precision mandrel & die-formed
• Oil quenched, hardened & tempered
• Military wrap standard
• Accurately heat-treated
• Manufactured from high grade spring steel
• Anti-friction pads in most applications
• Pre-stressed to maintain ride height
• Diamond cut ends
• Load rate tested

Spring Rate Options

• FS122C - 0-300kg Light Load
• FS122L - 300kg Constant Load
• FS122LL - 500kg Constant Load

Important Notes

• Recommend fitting long travel shock absorbers with raised springs
• Constant Load refers to weight that remains in/on the vehicle
• Fixed accessories considered as Constant Load
• Select the most relevant spring rate for best results

Select the most appropriate spring rate option to suit the fixed accessories on the vehicle:

Approximate Lift Height: 20-25mm

FS122C - 0-300kg Light Load
FS122L - 300kg Constant Load
FS122LL - 500kg Constant Load

Sold Individually.

High quality 4x4 suspension upgrades proudly sold by PPD Performance.

Shipping Policy

PPD Performance offer custom built suspension solutions, with unique adjustability and performance.

These kits are assembled to order to suit your requirements, with an average lead time that can vary between 1-3 days.

If you need a specific eta, please contact us before ordering and we will be sure to assist you.