What Tire Size Fits Your Truck (and How Much Lift You Need)

Bigger tires are the upgrade most truck owners want first. They change how your truck looks and how it handles gravel, mud, and snow. But the size you can run depends on your suspension. Put a tire on that is too big for your setup and it rubs, which is loud, wears the tire out, and can damage your truck. This guide explains what fits, how much lift each size needs, and how to avoid rubbing.

Why Tire Size and Lift Go Together

Your truck only has so much room in the wheel wells. A bigger tire needs more room, and a lift or a leveling kit is how you make that room. The taller the tire, the more lift you usually need to clear it.

There is more to it than height, though. A bigger tire can rub when you turn the wheel all the way, when you hit a bump, or when the suspension flexes off-road. The goal is a tire that clears in all of those situations, not just sitting still in the driveway.

"Everybody asks how big they can go. The real question is how big they can go without rubbing. That answer is different for every truck, and that is the part we figure out before you spend a dime." - Dave Barrette, Bold Off-Road

Fitment by Setup: What Each One Clears

Here is a general guide for a typical half-ton truck. Your exact fit depends on your make, model, year, and wheels, so treat this as a starting point.

•     33 inch tires: Usually fit with a leveling kit on many trucks, and may need minor trimming.

•     35 inch tires: Usually want a small lift of 2 to 3 inches, or a leveling kit plus some trimming. Re-gearing helps the truck drive right.

•     37 inch tires: Need a bigger lift of 4 to 6 inches or more, and almost always need trimming and re-gearing.

Heavier-duty trucks and certain trims can sometimes clear a bigger tire with less lift. That is exactly the kind of thing we check for your specific truck.

Rubbing, Trimming, and Backspacing

Two things decide whether a tire rubs: how the tire sits side to side, and how much room is in the wheel well.

Wheel backspacing and offset control how far the tire sticks in or out. Too much and the tire rubs the inside of the wheel well or the suspension. Too little and it sticks out past the fender and throws debris. Picking the right wheel is just as important as picking the right tire.

Trimming means cutting back parts of the fender liner or pinch weld so a bigger tire clears at full turn. On many trucks, a little trimming lets you run a bigger tire without a taller lift. We handle trimming cleanly so it still looks factory.

How Much Lift for 33s, 35s, and 37s

As a rule of thumb on a half-ton: 33s often fit with just a leveling kit, 35s usually want a small lift or a level plus some trimming, and 37s need a bigger lift and almost always trimming. Once you get to 35s and 37s, your truck is also moving a lot more tire, which brings up the next point.

When you go to a much bigger tire, the truck can feel sluggish and your fuel economy can drop. That is because the bigger tire changes your effective gearing. Re-gearing your axles brings the power and drivability back. We can tell you whether your build needs it.

Why Iowa Gravel and Winter Change the Math

Tire fitment is not just about size. In eastern Iowa, you are driving gravel in summer and salt, snow, and ice in winter. A tire that barely clears in the driveway can rub when the suspension loads up on a rough gravel road. We leave a little extra room for real-world Iowa driving, not just a clean photo.

Tread choice matters too. An all-terrain tire is the do-it-all pick for gravel and winter. A mud-terrain grips soft fields and trails better but is louder on the highway. See our truck tires and truck and Jeep wheels pages.

"The worst thing is a customer who buys tires online, throws them on, and they rub on the first gravel washboard. Measure first, then buy. It saves a lot of headaches." - Dave Barrette, Bold Off-Road

Get a Fitment Check Before You Buy

The cheapest way to get bigger tires is to get them right the first time. Before you buy, we measure your truck, look at your wheels, and tell you exactly what will fit and what it will take to clear. That way you do not pay for a tire that rubs or a lift you did not need. See our leveling kit vs lift kit page for the lift side of the decision.

What to Check Before You Buy Bigger Tires

•     Know your truck's make, model, year, and current wheel size before shopping.

•     Match your wheel backspacing to the tire so it does not rub or stick out too far.

•     Plan for trimming if you want a bigger tire without a taller lift.

•     Think about re-gearing if you are jumping to 35s or 37s.

•     Leave room for real Iowa driving, not just a static fit.

Frequently Asked Questions

Can I fit 35s without a lift?

On most half-ton trucks, no, not cleanly. A 35 inch tire usually needs at least a small lift or a leveling kit with some trimming. Some heavier-duty trucks can get close with less. We measure your truck to tell you for sure.

Will bigger tires rub on my truck?

They can, if the size or wheel is wrong for your setup. Rubbing usually happens at full turn or over bumps. The right tire size, the right wheel backspacing, and a little trimming when needed keep it from rubbing.

Do I need to re-gear after bigger tires?

For a big jump to 35s or 37s, often yes. Bigger tires change your effective gearing, which makes the truck feel slow and hurts fuel economy. Re-gearing the axles fixes that. Smaller jumps may not need it.

How do I know what backspacing I need?

It depends on your truck and how aggressive you want the stance. We measure and recommend a wheel that fills the fender without rubbing inside. Bring your truck in and we will sort it out.

Find Your Fit at Bold Off-Road

Do not guess at tire size and end up with a setup that rubs. Bring your truck to Bold Off-Road in Coggon and we will measure it, tell you exactly what fits, and get the tires and lift right the first time. Call (563) 277-8830 or stop by the shop off Highway 13. Let's get you the look and the clearance you want.