What Size Winch for a Truck: Start at Your GVWR x 1.5

Ask what winch to buy and you'll get an argument about brands. Ask what size, and the answer is a multiplication problem with a number printed on your truck. WARN, Superwinch and Smittybilt all start from the same 1.5 multiplier. Where they differ is what they multiply it by, and on a pickup that difference can be a whole size.

We size from WARN's rule, because it uses a figure the truck maker prints for your exact truck and doesn't move with what you threw in the bed this weekend. Then we check the parts the formula leaves out: how much rope is on the drum, what the bumper is rated for, and what the winch and its bumper add over the front axle.

WARN's formula, and why we use it

WARN's winch comparison page puts it in one line: "GVWR X 1.5 = minimum pulling capacity." Take your vehicle's gross vehicle weight rating, multiply by 1.5, and treat the answer as a floor; WARN says you can always go up from it. Its Basic Guide to Winching says the same thing for any load: calculate the gross weight of what you intend to pull, multiply by 1.5, and never exceed the rating of the winch or the winch rope.

GVWR is the most your truck is rated to weigh with people, cargo and accessories aboard. That's why we like it as the base. A stuck truck is rarely an empty truck, and the label number is the most it is rated to weigh, however it's loaded. We don't print GVWRs for any truck, because they change with cab, bed, drivetrain and package; the figure for yours is on the label in the driver's door jamb.

The 1.5 is margin, not padding. Mud, a grade and a rope wound several layers deep all ask more of the winch than the truck's weight alone, and none of the makers prints a separate allowance for them.

The math, by winch size

Divide a winch's rating by 1.5 and you get the heaviest GVWR it covers by WARN's rule. This is our arithmetic on WARN's formula, not a WARN table:

Going the other way (our arithmetic again), a truck with a 7,000 lb GVWR needs at least 10,500 lb of winch, so a 10,000 lb unit is short by WARN's rule and the next common size up is the answer. Land between two sizes and you buy the bigger one; the formula gives a minimum, never a target to round down to.

WARN's comparison page says its off-road winches run from 8,000 to 16,500 lb. By the same division, a label above 11,000 lb puts you past that whole range. If that's your truck, ask WARN directly what it recommends rather than stretching the table.

Midsize, half-ton and HD: read the label, not the badge

The class of truck tells you roughly where to look and nothing more. Midsize pickups (Tacoma, Ranger, Colorado and Canyon) are lighter trucks than half-tons (F-150, Silverado 1500 and Sierra 1500, Ram 1500, Tundra), and HD trucks (2500 and 3500, Super Duty) are heavier again. Inside each class, GVWR moves with the cab, bed, engine and package, and two trucks wearing the same badge can land on opposite sides of a size line.

So don't size from the model name or from what a friend's truck runs. Open the driver's door, find the GVWR on the label, and do the multiplication for your truck. If you've added a bumper, a bed rack and a camper since it left the factory, the label still sets the line, and a truck loaded past it has a bigger problem than winch size.

Take one owner's choice: a built truck expected to weigh close to 7,000 lb, and WARN's 8,000 or 10,000 lb winch. The 10 is the better of the two. But WARN's rule runs on the label, not on an estimate of what the truck weighs: if 7,000 lb were the GVWR, the multiplier would ask for 10,500 lb, past both.

Where the makers disagree

All three use 1.5. They don't agree on what to multiply:

• WARN: GVWR x 1.5 is the minimum. The base is the rating on the label.
• Superwinch: its sizing guide says vehicle GVW x 1.5, defining GVW as the total operating mass of the vehicle as set by the manufacturer and saying it's usually on a tag or plate inside the driver's door frame, with the example of a 6,000 lb GVW needing a 9,000 lb winch. It adds that if you tow a trailer off road, you base the sum on the gross combined weight rating (GCWR), which it describes as the GVW plus the trailer weight.
• Smittybilt: its Winches 101 guide calls 1.5 times the weight of your vehicle the industry standard, says to go higher rather than lower in case the GVWR is maxed out, and says most adventure rigs target 2x the vehicle weight.

The base matters more than the multiplier. Take a hypothetical truck with a 6,000 lb GVWR that weighs 5,000 lb on the scale as you usually drive it. WARN's rule asks for 9,000 lb. Smittybilt's 1.5 times vehicle weight, fed that 5,000 lb, asks for 7,500 lb, a size smaller, while its 2x figure asks for 10,000 lb. We'd take WARN's base. It's a rating printed on the truck rather than a weight that changes with the load, and the day you need a winch is often the day the truck is heaviest.

Superwinch's trailer point is worth keeping too, and WARN's guide points the same way when it says to size from the gross weight of what you intend to pull. If a loaded trailer will be on the end of the rope off road, its weight belongs in the sum.

The rating is a first-layer number

WARN rates its winches on the first layer of rope on the drum, and pulling power drops with each layer that builds up, so WARN tells you to unspool as much rope as you can when rigging and to pick a distant anchor or double the line with a snatch block to reduce the load on the winch. A winch with most of its rope still spooled is pulling below the number on the box.

This is where we part ways with the advice to buy a smaller winch and lean on a snatch block. A block reduces the load on the winch, per WARN, but it adds a block, a shackle, an anchor point and a tree strap to the chain, and each of those has its own rating and its own way to fail. We'd size the winch from the label first and treat a snatch block as the tool for the hard pull, not as a way to make up for an undersized winch on every pull.

Superwinch's guide adds the ground: freeing a truck from a mud pit takes more than pulling it along a dirt road, and an incline takes more than a flat road. Neither maker turns that into a separate multiplier, which is one more reason to treat 1.5 as the floor.

The winch is rarely the weakest link

The winch's rating never raises anything else's: the rope, hook, shackles, straps, anchor, bumper or mount and the truck's frame each have their own limits, and the lowest one governs the pull. WARN's guide says never to exceed the winch or winch rope rated capacity and to be certain the anchor you select will withstand the load.

• Mount rating: ask the bumper or mount maker whether it is rated for the winch's line pull on your truck and whether its instructions call for frame reinforcement brackets. Their answer governs, not the winch's rating.
• Front-end weight: a steel bumper plus a winch adds weight over the front axle. Check the bumper maker's figure, the winch maker's if it publishes one, and your truck's front axle rating (GAWR) on the door-jamb label.
• Recovery points: which points on your truck are rated for recovery is the truck maker's or the bumper maker's call, not the winch maker's: use only a point your owner's manual or the bumper maker rates for it, and if neither calls it a recovery point, don't treat it as one.
• Rigging: size the shackles, tree strap and any snatch block to the pull, and check each one's rating on its own documentation. A stretchy recovery strap never goes in a winching setup; WARN says never to use one in a winching operation.

For the install, follow the winch maker's installation guide; we don't give wiring steps or torque numbers, and if you aren't comfortable with high-current wiring, have a shop do it.

Buying for the size you need

If your label reads 6,667 lb or less, we'd buy the WARN VR EVO 10-S. It's a 10,000 lb synthetic-rope winch with the same limited lifetime mechanical and seven-year electrical warranty WARN prints for its premium lines, and our review goes through its remote recall and the bumper work owners report. Above that line, WARN's own formula points you past it. In WARN's own VR EVO line the next size is the 12 or 12-S at 12,000 lb, which meets the minimum for a GVWR up to 8,000 lb by the same arithmetic.

We haven't reviewed the WARN VR EVO 12-S, but it's where we'd look first for a label between 6,667 and 8,000 lb. WARN's product page lists the same 10 x 4.5 in four-bolt pattern, 90 ft of 3/8 in synthetic rope and warranty terms as the 10-S, with a 234:1 gear train. WARN calls it ideal for 3/4-ton and one-ton pickups; we'd still let the label decide, because by WARN's own formula 12,000 lb meets the minimum only up to an 8,000 lb GVWR. At our check a third-party seller had the Amazon listing, so check the seller before you buy.

Whatever you buy, buy the rigging with it. WARN's guide says to lay a damper over the rope midway between the winch and the anchor before you put it under tension, and never to wrap the rope back on itself around an anchor. And learn to rig before the day you need to. A winch that's the right size, on a mount rated for it, still depends on the person setting the anchor, standing clear and keeping everyone else clear. WARN's guide is the place to start, and a hands-on recovery class is a good second step.