Carbon Offroad / Winch sizing
What size winch do I need?
Start with 1.5 times your vehicle’s GVM, then choose a winch with a rated line pull at or above that figure.
A 3,500 kg GVM works out to roughly 11,600 lb, so a 12,000 lb winch meets this starting rule. Your bull bar, mounting space and electrical setup still need to suit the winch.
01 / Start with your vehicle
Winch size calculator
Enter your vehicle’s GVM in kilograms. The calculator applies the 1.5 times rule and shows the next capacity in the touring range compared below.
You can find your starting capacity in the winch sizing chart. Multiply GVM by 1.5, then divide by 0.45359237 to convert kilograms to pounds.
Worked example: 3,500 kg GVM
12,000 lbNext touring capacity in this guide.
3,500 kg × 1.5 = 5,250 kg, or 11,575 lb rounded up.
Enter your own GVM to calculate your starting point.
A capacity calculation is a starting point. It does not confirm vehicle fitment or the force needed for a particular recovery. This calculator covers vehicle-only sizing for 4WDs and touring vehicles. Ask us about race, ATV, trailer or specialised installations.
02 / Check the numbers
Winch size chart by vehicle GVM
Find the closest example below, or calculate your exact GVM. The last column shows the next size from the 10K, 12K, 15K and 20K touring winches featured in this guide.
| Vehicle GVM | GVM × 1.5 | Calculated pull | Touring size shown here |
|---|---|---|---|
| 2,000 kg | 3,000 kg | 6,614 lb | 10,000 lb |
| 2,500 kg | 3,750 kg | 8,268 lb | 10,000 lb |
| 3,000 kg | 4,500 kg | 9,921 lb | 10,000 lb |
| 3,500 kg | 5,250 kg | 11,575 lb | 12,000 lb |
| 4,000 kg | 6,000 kg | 13,228 lb | 15,000 lb |
| 4,500 kg | 6,750 kg | 14,882 lb | 15,000 lb |
| 5,000 kg | 7,500 kg | 16,535 lb | 20,000 lb |
These are weight examples, not vehicle fitment recommendations. The touring range compared here starts at 10,000 lb. A lighter vehicle may meet the calculation with a smaller winch, but its intended use and mounting requirements still need checking.
03 / Understand the calculation
How to calculate winch size using GVM
GVM means gross vehicle mass: the maximum permitted loaded mass of your vehicle. It includes the vehicle, passengers, fuel, accessories and everything you carry.
Use GVM, not empty vehicle weight
Kerb weight does not account for your full touring load. Sizing from GVM allows for the vehicle at its permitted loaded mass, rather than how much it weighs on a light day.
Check your owner’s manual, manufacturer’s specifications or vehicle identification information. If you have an approved GVM upgrade, use the upgraded figure. A weighbridge measures your actual loaded mass; it does not set your GVM.
Allow for the recovery itself
A vehicle rolling on firm ground is a different load from one buried in mud or resting on its chassis. Ground conditions, gradients, rope layers and the recovery setup all affect the pull required.
The 1.5 times rule helps you choose a capacity class. It does not mean the winch can recover that vehicle in every situation. Follow the winch manual and use equipment rated for the recovery.
Had a GVM upgrade?
A 3,500 kg vehicle falls within the 12,000 lb starting guideline. At 4,500 kg, the calculation points to 15,000 lb. Check whether your existing bull bar and mounting system can accept the larger winch before changing it.
04 / Choosing a capacity
Is a 12,000 lb winch enough for my 4WD?
Under the 1.5 times rule, a 12,000 lb winch covers a GVM of about 3,628 kg. A 3,500 kg vehicle is within that figure. A vehicle with a 4,000 kg or 4,500 kg GVM points to a 15,000 lb capacity instead.
That makes your exact GVM more useful than the vehicle badge. Two vehicles of the same model can have different specifications or approved upgrades. Read the figure for your vehicle before choosing a winch.
Also check your bull bar’s maximum winch rating. If the bar is limited to 10,000 lb, fitting a 12,000 lb winch is not a way around that limit. Speak to the bar manufacturer or your installer about a suitable setup.
05 / Rated pull and rope layers
Why pulling power drops as the drum fills
A winch’s rated line pull applies to the first rope layer. As more rope winds onto the drum, its effective diameter increases and the available pull drops.
Source: Carbon 12K V3X performance specifications.
Keep the minimum wraps specified in your winch manual. Spooling out can reach a lower rope layer, but the rope must retain the manufacturer’s required wraps on the drum. Never rely on the rope’s attachment to the drum to hold the load.
06 / Before you order
Check the winch fits the whole setup
The right capacity is one part of the choice. Check these four things before ordering, particularly if you are replacing a smaller winch.
Bull bar and mount
Confirm the bar or cradle is approved for the winch’s rated capacity. Check the bolt pattern, fairlead position and mounting hardware against the winch and bar instructions.
Space and access
Check the complete winch dimensions, clutch access and control box location. Allow for cables and rope clearance. A matching bolt pattern alone does not confirm fitment.
Installed weight
Allow for the winch, rope, control box, cables, fairlead and hook. Check the complete installed weight rather than a bare-winch figure, along with your front-axle and GVM limits.
Electrical supply
Match the winch to the vehicle’s 12V or 24V system. Follow the model’s requirements for battery, cables, connections and isolation. Use its specified performance data when comparing current draw.
07 / Compare the touring range
Find a Carbon winch in your capacity class
These four capacities cover the touring examples above. Open each product for its current price, voltage options, dimensions and availability.
10,000 lb
Scout Pro 10K
For a setup that meets the 10,000 lb calculation and the bar manufacturer’s installation requirements.
GVM calculation up to 3,023 kg.
12,000 lb
Carbon 12K V3X
Meets the starting calculation for a 3,500 kg GVM. Check the complete kit dimensions and your bull bar rating.
GVM calculation up to 3,628 kg.
15,000 lb
Scout Pro 15K
Meets the starting calculation for a 4,500 kg GVM. Confirm your mounting system is approved for this capacity.
GVM calculation up to 4,535 kg.
20,000 lb
Scout Pro 20K
A higher-capacity option for heavier vehicles. Check mounting space, installed weight and the electrical supply.
GVM calculation up to 6,047 kg.
GVM figures use rated first-layer pull ÷ 1.5 and are rounded down to whole kilograms. They describe the calculation only and do not confirm vehicle or bull bar compatibility.
Race, buggy, ATV or utility installation?
The RS9 high-speed winch and RS9-S short-drum winch suit different priorities from a general touring build. For smaller applications, explore the ATV and utility range. Check the intended use and mounting requirements rather than selecting these by capacity alone.
08 / Common questions
Winch sizing FAQs
Should I choose a 9,500 lb or 12,000 lb winch?
Using the 1.5 times rule, 9,500 lb covers a GVM of about 2,872 kg, while 12,000 lb covers about 3,628 kg. For a 3,000 kg GVM, the calculation is roughly 9,921 lb, so 9,500 lb falls below it. A 10,000 lb or 12,000 lb model meets that capacity calculation, subject to fitment and use.
Can a winch be too big for my vehicle?
Yes. A higher-capacity winch can exceed the bull bar’s rating or be too large for the available space. It may also have different weight and electrical requirements. More rated pull does not remove those limits, so check the complete installation before moving up a size.
Do I use GVM or the vehicle’s actual weight?
This guide uses GVM so the calculation allows for the vehicle at its permitted loaded mass. Actual weight changes with passengers, fuel and gear. Using a lighter trip weight reduces the allowance built into the calculation. If you have an approved GVM upgrade, use the upgraded GVM.
Does a 4,500 kg GVM upgrade mean I need a 15,000 lb winch?
The calculation is 4,500 × 1.5 = 6,750 kg, which is about 14,882 lb when rounded up. A 15,000 lb winch meets that starting rule. Confirm that the bull bar, mounting space and electrical supply are suitable before choosing it.
Do I include my camper trailer in the calculation?
This calculator is for the vehicle alone. A vehicle and trailer combination introduces additional resistance and recovery considerations. Do not substitute GCM or add trailer weight and assume the result confirms a suitable recovery setup. Get advice for the combination and conditions from a qualified recovery trainer and the equipment manufacturers.
Can I use a double-line pull instead of buying a larger winch?
A correctly arranged double-line pull can increase the force available at the vehicle, but the loads depend on the rigging and friction. The winch, anchor, recovery points and every component must be suitable. It is a recovery technique to learn from proper training and the equipment instructions, not a blanket reason to buy an undersized winch.
Should I choose 12V or 24V?
Choose the version that matches the electrical system supplying the winch. Voltage alone does not tell you which model has more rated pull or uses less power. Check the specifications and installation requirements for the exact version you are buying.
Need a hand choosing?
Tell us what you’re fitting it to.
Send the Carbon team your vehicle model, GVM, bull bar make and model, and whether you run 12V or 24V. Include any GVM upgrade and how you plan to use the winch.
About this guide: Capacity examples use GVM × 1.5 and 1 lb = 0.45359237 kg. Rope-layer figures are from the linked Carbon 12K V3X specifications. Follow the current instructions for your exact winch, mounting system and recovery equipment.
For warranty cover and conditions, see the Carbon winch warranty.