BFGoodrich Tire Diameter Chart | Sizes At A Glance

Common BFGoodrich truck and SUV sizes run from about 30 to 37 inches in overall diameter, depending on tire size and wheel diameter.

If you came here for a BFGoodrich Tire Diameter Chart, the fast read is simple: most daily-driven truck and SUV setups land in the 30- to 33-inch range, while lifted and trail-focused builds push into 35s and 37s. Tire diameter is the number that changes clearance, gearing feel, and speedometer reading the most.

That is why diameter matters more than width for a first pass. Width changes stance and tread footprint. Diameter changes how tall the truck sits, how far it rolls with each turn, and how close the tire gets to the fender, liner, and body mount.

BFGoodrich’s public size pages show a broad spread of fitments, with listings from 13-inch through 22-inch rim sizes. That gives you old-school 15-inch off-road sizes, stock 17s and 18s, and larger late-model street-truck sizes under one brand.

How To Read The Sidewall Before You Read The Chart

The size code tells you almost everything you need. On a metric tire such as LT285/70R17, the 285 is width in millimeters, the 70 is sidewall height as a percentage of width, and the 17 is wheel diameter in inches. BFGoodrich spells out each part of that code on its How to Read a Tire Sidewall page.

On flotation sizes, the read is even easier. A size like 35×12.50R17 leads with the advertised overall diameter. That makes it quick to compare 33s, 35s, and 37s without doing sidewall math in your head.

If you want a clean way to browse what the brand actually lists, BFGoodrich also has size listings by rim diameter. That page is handy when you know your wheel size but have not settled on tire height yet.

Why Diameter Changes The Feel Of The Truck

A taller tire rolls farther with each turn. That can drop cruise rpm a bit, add ground clearance under the axle, and fill the wheel well better. It can also make the truck feel softer off the line, shift the speedometer, and raise the odds of rubbing when you turn or stuff the suspension.

• More diameter adds axle clearance.
• More diameter can change rubbing points at full lock.
• More diameter can alter speedometer and odometer readings.
• More diameter can make stock gearing feel taller.

That is why a diameter chart is more useful than a plain size list. It gives you the number that affects fitment first, then lets you sort out width, tread pattern, and wheel choice after that.

BFGoodrich Tire Diameter Chart By Popular Size Family

The chart below mixes popular flotation sizes with common metric truck sizes. For metric sizes, the diameter figure is worked out from the sidewall code and rounded to the nearest tenth of an inch. For flotation sizes, the stated diameter in the size itself is used.

BFGoodrich Size	Approx. Overall Diameter	Where It Often Lands
30×9.50R15	30.0 in	Older small trucks and light 4×4 builds
31×10.50R15	31.0 in	Mild step up on stock or near-stock older rigs
32×11.50R15	32.0 in	Fills the wheel well without jumping to a full 33
33×12.50R15	33.0 in	Common trail size on classic 15-inch wheel setups
LT265/70R17	31.6 in	Near-stock full-size truck and SUV range
LT275/70R17	32.2 in	Small jump over many stock 31-inch-class tires
LT285/70R17	32.7 in	A go-to metric size in the 33-inch class
LT315/70R17	34.4 in	Near-35-inch look with a metric label
35×12.50R17	35.0 in	Classic lifted-truck target size
37×12.50R17	37.0 in	Big-build territory with fitment planning

What The Chart Shows Right Away

The first thing that stands out is how tight the steps are in metric sizing. Jumping from LT265/70R17 to LT285/70R17 adds just over one inch of diameter. On paper, that does not sound huge. On the truck, it can be the line between easy fitment and trimming plastic or changing wheel offset.

The second thing is how close some metric sizes sit to popular flotation sizes. LT315/70R17, at about 34.4 inches, lives in the same visual neighborhood as a 35-inch tire. That is why some owners call it a “metric 35,” even though the exact number is a bit lower.

How To Use This Chart On Your Own Vehicle

Start with the tire size on your current sidewall or door sticker. Then compare total diameter, not just width. Width gets most of the attention because it is easy to spot. Diameter is what tells you how much the truck will really change.

On Stock Trucks And SUVs

If the truck is mostly a road truck with light dirt use, staying within about one inch of the stock diameter keeps the swap calmer. You are less likely to fight rubbing, less likely to need a speedometer correction right away, and more likely to keep the same easy road manners.

On Leveled And Lifted Builds

A level or lift gives you room, but it does not solve every fitment issue. Wheel width, offset, tire width, tread shape, and suspension travel still matter. A narrow 35 can fit where a wide 33 rubs. That is why diameter should be your first filter, then width, then wheel specs.

Clearance

Check the rear of the front wheel well, the liner, the body mount area, and the upper fender. Those are common trouble spots as diameter rises into the 33- to 35-inch band.

Speedometer

A taller tire travels farther per revolution, so the speedometer may read lower than your real speed. The bigger the jump, the bigger the gap.

Gearing Feel

Taller tires can make a truck feel heavier leaving a stop. If you tow, crawl, or run steep grades, you will notice that sooner than someone who only drives flat city miles.

Diameter Band	What Usually Changes	Where It Fits Best
30.0–31.9 in	Near-stock feel, mild clearance gain	Daily driving and stock-height setups
32.0–32.9 in	More wheel-well fill, closer fitment checks	Leveled trucks and mixed road/trail use
33.0–34.4 in	Clear visual jump, rubbing checks matter more	Popular middle ground for tougher builds
35.0 in	Fitment planning gets tighter, speedometer drift grows	Lifted midsize and half-ton trucks
37.0 in	Full fitment planning, gearing and calibration matter more	Serious trail builds planned around the tire

Pick Diameter First, Then Pick The Tread

A lot of buyers shop tread pattern first. That makes sense if mud grip, snow use, or road noise is top of mind. Still, diameter should come first because it decides fitment. Once you know the height that works, you can sort out whether a Trail-Terrain, All-Terrain, or Mud-Terrain tread fits the job better.

• 30- to 32-inch sizes keep day-to-day driving easy.
• 33-inch-class sizes are the middle ground many truck owners want.
• 35-inch sizes suit lifted trucks that are built with more room in mind.
• 37-inch sizes belong on builds planned around that jump.

One more thing: do not let the wheel diameter fool you. A 17-inch wheel with a tall sidewall can carry a larger overall tire than a 20-inch wheel with a shorter sidewall. The tire’s full outside diameter is the number that tells the real story.

That is the value of a BFGoodrich Tire Diameter Chart. It turns a long list of sidewall codes into a short, useful read on what will fit, what will clear, and what will change once the truck is back on the road.