Toughdog Rear Leaf Springs for Holden Colorado RG (2012+) deliver proven heavy-duty performance engineered for Australian touring, towing, and trade use. Purpose-built to handle constant accessory loads while maintaining on-road comfort, these premium leaf springs offer exceptional durability backed by Toughdog's reputation as Australia's most trusted suspension brand. In stock now with fast nationwide dispatch and expert fitment support.
Browse all compatible suspension parts for your Rear Leaf Springs Suits - Holden using our parts finder.
| Make | Model | Series | Years | Configuration |
|---|---|---|---|---|
| Holden | Colorado | RG | 2012-2020 | All engines (2.5L, 2.8L diesel) |
| Holden | Colorado | RG Facelift | 2020-2023 | All cab configurations |
Not sure if this fits your vehicle? Use our Colorado RG parts finder or contact our suspension experts for confirmed fitment advice.
Selecting the correct spring rate is critical for optimal performance and ride quality. Toughdog leaf springs are rated based on constant accessory load — the weight permanently fitted to your vehicle. Common rear accessories include aluminium or steel canopies (60-120kg), toolboxes and drawer systems (40-80kg), dual battery setups (20-30kg), long-range fuel tanks (40kg empty), and rear bars with spare wheel carriers (30-50kg). Calculate your total constant rear load and select springs accordingly — occasional loads such as camping gear, passengers, or towing are NOT considered constant load. Over-rating your springs will result in a harsh, uncomfortable ride and may cause premature wear to other suspension components including bushes and shock absorbers.
Professional installation by a qualified suspension technician is strongly recommended to ensure correct fitment, torque specifications, and safety compliance. Wheel alignment is mandatory after installation as leaf spring replacement can alter rear axle tracking and pinion angle. All Toughdog leaf springs require a 500km break-in period during which the springs will settle and reach their designed ride height — avoid maximum loads during this period. For vehicles fitted with heavy constant loads or used for frequent towing, consider pairing these springs with airbag suspension systems for on-demand load adjustment and leveling capability.
Toughdog has earned its reputation as Australia's number one suspension brand through decades of proven performance in the harshest conditions our country can deliver. Every Toughdog component is engineered to Australian Design Rules (ADR) standards and extensively tested across outback corrugations, coastal salt exposure, and heavy towing applications. Trusted by tradespeople, grey nomads, and serious tourers nationwide, the complete Toughdog range is backed by comprehensive warranty and local technical support you can rely on when you're far from home.
These rear leaf springs are ideal for Holden Colorado RG owners who carry constant accessory loads including tradespeople with canopies and toolboxes, touring enthusiasts with dual battery systems and water tanks, and regular caravan or trailer towers requiring improved rear suspension support. If you frequently carry maximum payload or tow near your vehicle's rated capacity, these springs restore proper ride height and handling while maintaining comfortable on-road manners for daily driving and family use.
In stock now at 4WD Suspension Australia with fast dispatch to all states and territories. Our suspension specialists are available to provide expert fitment advice and help you build a complete suspension upgrade including shocks, bushes, and hardware. Explore our complete range of lift kits and suspension components to transform your Colorado's capability and comfort.
These Toughdog rear leaf springs are specifically engineered to fit all Holden Colorado RG models from 2012 onwards, including both the original RG series (2012-2020) and the facelifted RG model (2020-2023). They're compatible with all engine variants including the 2.5L and 2.8L diesel, and fit both single cab, space cab, and crew cab configurations. If you're unsure about your specific model year or variant, our Colorado RG parts finder tool can confirm exact fitment, or contact our team for personalized advice.
Toughdog rear leaf springs are designed primarily for load support and ride quality rather than significant lift. Depending on the spring rate selected and your vehicle's current rear load, you can expect 0-25mm of rear lift when fitted to a lightly loaded vehicle. The main purpose of these springs is to restore factory ride height on sagging suspension or to maintain proper ride height when carrying constant accessory loads like canopies and toolboxes. For dedicated lift applications, these springs work best as part of a complete lift kit system that includes front suspension upgrades to maintain balanced vehicle geometry.
This kit includes a pair (2 x) of Toughdog heavy-duty rear leaf springs with multi-leaf progressive rate design, complete with centre bolts and spring clips pre-assembled. The springs feature heat-treated spring steel construction with corrosion-resistant coating applied. Please note that spring bushes, shackles, U-bolts, and mounting hardware are NOT included and must be purchased separately or reused from your original springs if in good condition. Fitment instructions and a spring rate selection guide are included to help you achieve optimal performance from your new suspension setup.
Yes, Toughdog leaf springs are specifically engineered to handle towing applications and will significantly improve rear suspension performance when towing caravans, camper trailers, or boat trailers. The progressive rate multi-leaf design reduces rear squat under tow ball load and maintains proper suspension geometry for improved stability and control. However, it's crucial to select the correct spring rate based on your constant accessory load (canopy, toolbox, etc.) rather than your towing weight — occasional towing loads are not considered when selecting spring rates. For maximum towing versatility and the ability to fine-tune ride height under varying loads, consider adding airbag suspension alongside these leaf springs.
Control arms are a front suspension component, so they're not directly affected by rear leaf spring replacement. However, if you're planning a complete suspension upgrade or experiencing any front-end wear, it's an ideal time to inspect your front suspension components. Many Colorado RG owners combine rear leaf spring upgrades with front coil springs and shocks for a balanced suspension setup. If your vehicle shows signs of front control arm bush wear, ball joint play, or uneven tyre wear, addressing these issues during your suspension upgrade will maximize the performance and longevity of your entire system.
Yes, professional wheel alignment is mandatory after fitting new rear leaf springs to your Holden Colorado. While leaf springs primarily affect rear suspension, their replacement can alter rear axle tracking, pinion angle, and overall vehicle geometry, which affects steering, handling, and tyre wear patterns. A four-wheel alignment should be performed by a qualified technician once the springs have settled (after approximately 500km of driving). This ensures your Colorado tracks straight, tyres wear evenly, and you achieve optimal handling and safety. Most reputable suspension installers will include alignment as part of their fitment service.
Yes, Toughdog manufactures leaf springs in multiple spring rates to suit different load configurations. When ordering, you'll need to calculate your constant accessory load — this is the permanent weight fitted to your vehicle including canopies (60-120kg), toolboxes (40-80kg), dual batteries (20-30kg), and other permanently installed accessories. It's critical to select springs rated for your actual constant load only — do NOT factor in occasional loads like camping gear, passengers, or towing weight. Over-rating your springs by selecting a heavier rate than required will result in an unnecessarily harsh ride and may cause premature wear to other suspension components. Our team can help you calculate your load and select the appropriate spring rate.
Rear leaf springs alone provide minimal lift (typically 0-25mm) and are designed primarily for load support rather than tyre clearance. If your goal is to fit significantly larger tyres, you'll need a complete lift kit that addresses both front and rear suspension height equally. Most Holden Colorado RG models can fit approximately 265/70R17 or 265/65R18 tyres with a 2-3 inch lift kit without rubbing issues. The actual tyre size you can run depends on your wheel offset, guard trimming, and whether you install a complete suspension lift system. Contact our team with your specific tyre size goals and we can recommend the appropriate suspension components.
Toughdog leaf springs are backed by the manufacturer's comprehensive warranty against defects in materials and workmanship. The specific warranty period varies by component and usage type, so we recommend checking with our team at time of purchase for current warranty terms. Warranty coverage requires professional installation by a qualified technician with proof of fitment, and proper maintenance including regular inspection of bushes, shackles, and U-bolts. As an authorized Toughdog dealer, 4WD Suspension Australia provides full warranty support and can facilitate any claims should issues arise during the warranty period.
Absolutely — Toughdog leaf springs are engineered to balance heavy-duty load capacity with excellent on-road comfort for daily driving. Unlike cheaper aftermarket springs that can deliver a harsh, truck-like ride, Toughdog's progressive rate design provides a comfortable unladen ride that progressively stiffens as load increases. This makes them ideal for Colorado owners who use their vehicle as both a daily family transport and a weekend tourer or work truck. When properly matched to your constant accessory load, these springs eliminate the common sag issues of worn factory suspension while maintaining the comfortable ride quality your family expects from a modern dual-cab ute.
Perfect Upgrade for Our Loaded Colorado
Fitted these Toughdog rear leaf springs to our 2015 Colorado and the difference when loaded up for camping trips is night and day. The rear end no longer sags with the camper trailer hitched up and all the family gear in the tub. Ride quality is surprisingly comfortable even when running empty around town, which was a pleasant surprise after hearing horror stories about heavy duty springs.(5)
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