What Size Tires Can I Put on My Silverado? A Complete Guide

There is no single answer to what size tires you can put on your Silverado. The right size depends on your truck’s year, trim, and wheels.

This guide starts with the basics. You will learn how to find your factory size, which sizes are common, and how big you can go on a stock truck.

You will also see what changes when you go bigger. Tire size affects your speedometer, your gearing, and your fuel use.

Key Highlights

• Your factory tire size is printed on the placard on the driver’s door jamb.
• Common Silverado sizes include P265/70R17, 265/65R18, and 275/60R20.
• Many stock trucks can run tires up to about 33 inches tall, but width and wheel offset matter.
• 275/65R18 is a factory size on many trims, and it fits stock trucks.
• Bigger tires make your speedometer read low and soften your effective gearing.
• A leveling kit helps fit larger tires, but it does not make every size fit.

How to Find Your Silverado’s Stock Tire Size

Start with the truck itself. The placard on the driver’s door jamb is the most reliable source. It lists the original tire size and the recommended cold pressure.

Your owner’s manual lists the same facts. If the paper copy is gone, Chevrolet’s owner resources can help you find the manual for your exact year.

Check the Sidewall Too

The size is also printed on the tire sidewall. Read it, but with one caution. A past owner may have changed the size, so the sidewall may not match the factory fit.

When the placard and the sidewall agree, you can be confident. When they differ, trust the placard.

How to Read a Tire Size Code

Take P265/70R17 as an example. The 265 is the width in millimeters. The 70 is the aspect ratio, so the sidewall height is 70 percent of the width.

The R means radial construction. The 17 is the wheel diameter in inches. The P stands for passenger. A size that starts with LT is a light truck tire, built for heavier loads.

Common Factory Tire Sizes

Silverado trucks have used many sizes over the years. Older trucks often came on smaller wheels. Newer trucks use larger wheels and lower-profile tires.

Here are the sizes you will see most often, with their overall diameters:

Your truck may differ. Trim, cab style, and options all change the factory fit. That is why the placard check comes first.

Heavy-duty 2500 trucks follow stricter rules. They use LT tires with higher load ratings. If you tow or haul, capacity matters more than looks, so keep the load rating at or above the factory spec.

How Big Can You Go on a Stock Silverado?

On most stock Silverado 1500s, the practical limit is about 33 inches of overall diameter. Many owners run a 33-inch-class tire with no lift at all.

Width matters as much as height. A narrow 33 often clears where a wide 33 rubs. The wider tire swings closer to the liner at full steering lock.

Tires taller than that, such as most 35-inch setups, usually need a lift and trimming. Do not treat 35 inches as a simple bolt-on size for a stock truck.

Before you buy, do a quick clearance check:

1. Compare the new size with your current one, and note the extra height and width.
2. Turn the steering to full lock on both sides and inspect the gaps.
3. Leave room for the suspension to move over bumps.
4. If every gap is tight, choose a slightly smaller or narrower size.

Will 275/65R18 Fit a Stock Silverado?

Yes, in most cases. The 275/65R18 is about 32.1 inches tall. It is a factory size on many Silverados, so the truck was built with this fit in mind.

If your truck came on a smaller 17- or 18-inch size, this is a mild step up. Still check the clearance at full lock before you buy.

Can You Put 20-Inch Rims on a Silverado?

Yes. Twenty-inch wheels are a factory option on many Silverados. The key is the tire’s overall diameter, not the wheel size alone.

Match the diameter of your stock setup as closely as you can. A shorter sidewall keeps the total height in the same range.

When You Need a Leveling Kit or a Lift

Sizes close to stock need no suspension changes. Larger tires are different. A leveling kit raises the front of the truck by about 2 inches and levels the stance.

That extra room makes 33-inch tires a comfortable fit on most trucks. For 35-inch tires, plan on a taller lift, plus trimming in many cases.

After any leveling kit or lift, get a wheel alignment. Raising the front changes the angles the factory set. Skipping the alignment leads to uneven tire wear.

Choosing the Right Tire Type, Not Just the Size

Size decides fit. Tread type decides how the truck behaves once the tires are on. Highway all-season tires are quiet and efficient for daily driving.

All-terrain tires add grip on gravel, mud, and snow. They are the popular pick for trucks that leave the pavement.

If your winters bring real snow, a dedicated winter tire in the stock size beats a bigger all-terrain. Match the tire type to how you really drive.

What Bigger Tires Change

A taller tire rolls farther with each turn. Your speedometer will read lower than your true speed, and the gap grows with the size change. Our guide on how to calibrate a speedometer for larger tires on a Chevy walks through the fix.

Taller tires also soften your effective gearing. The truck can feel slower off the line and shift more on hills. Our guide to the best gear ratio for 33-inch tires explains when regearing makes sense.

Handling changes a little too. A wider tire can feel more planted. A much taller tire can feel softer in corners.

Pressure needs a fresh look as well. A new size carries loads differently, so set pressure by load. Our guide on how to calculate tire pressure for bigger tires shows the method.

Finally, remember the safety basics. The NHTSA tire safety pages explain why correct size and pressure matter. The U.S. Tire Manufacturers Association publishes the same care guidance for drivers.

What Happens If a Tire Is Too Big?

An oversize tire can rub the fender liner or suspension parts. Rubbing is worst at full steering lock and over bumps.

Too much tire also adds weight and rolling resistance. Fuel use can rise, and the steering can feel heavier.

None of this means you must stay stock. It means you should size the change with care, and check the fit before you pay.

Conclusion

So, what size tires can you put on your Silverado? Start with the placard size. Treat about 33 inches as the stock ceiling, and watch width and offset as closely as height.

If you go bigger, plan the whole job. Budget time for a leveling kit or lift, an alignment, and a speedometer check. A careful plan gives you the look you want without the rubbing and surprises.

Frequently Asked Questions

What is the smallest tire size for a Silverado?

It depends on the year. Older trucks came on smaller sizes, such as 15- and 16-inch fits. Your placard lists the smallest size Chevrolet fitted to your exact truck.

Do I need a lift kit to install larger tires?

Not always. Sizes close to stock fit with no changes. A leveling kit helps with 33-inch tires. Taller setups, such as most 35s, need a real lift and often trimming.

Will bigger tires affect my truck’s performance?

Yes, a little. Expect a speedometer error, a softer gearing feel, and possibly higher fuel use. Calibration and the right pressure keep those effects small.

Before You Buy: A Final Checklist

Run through this list before you pay for any new size:

• Your placard size is written down, and the new size is close in overall diameter.
• The load index of the new tire meets or beats the old tire’s rating.
• You checked clearance at full steering lock on both sides.
• Your spare is close to the new tires in diameter, or you have a plan for it.
• You know how you will correct the speedometer if the diameter changed.
• You set the new pressure by load, not by copying the old tires.

That short routine prevents most fitment mistakes. It takes minutes, and it beats returning a set of tires that rub.