How Tall Is a 225/75R16 Tire? | Size Explained

A 225/75R16 tire stands approximately 29.3 inches tall—roughly 744 mm in overall diameter.

If you’re shopping for tires or checking whether a set will clear your truck’s fenders, the height of a 225/75R16 tire is the number that matters most. The tire’s total diameter lands at about 29.3 inches, a figure that holds steady across most passenger and light-truck models in this size, though small variations exist between brands. Beyond the height, the size code also tells you the width, the sidewall proportion, and the wheel diameter it fits.

Here’s what each part of the 225/75R16 designation means, how tall the tire actually sits, and why two tires with the same size stamp can measure slightly differently.

Breaking Down the 225/75R16 Size Code

The numbers on the sidewall aren’t random—each one describes a specific physical dimension of the tire.

• 225 – The section width in millimeters, measured from sidewall to sidewall. That’s about 8.9 inches.
• 75 – The aspect ratio. The sidewall height is 75% of the width, which works out to roughly 168.75 mm (about 6.6 inches). It is not 75 inches or 75 millimeters—a common mix-up.
• R – Radial construction, the standard for modern tires.
• 16 – The wheel rim diameter in inches.

Add the sidewall height twice (top and bottom) to the rim diameter, and you get the total height: 6.6 + 6.6 + 16 = 29.2 inches. Most manufacturers round that to 29.3 inches in their spec sheets.

Height, Circumference, and Revolutions Per Mile

The height directly drives two other numbers that matter for speedometer accuracy and gearing: circumference and revolutions per mile.

A 225/75R16 tire has a circumference of roughly 92.0 inches, meaning it travels about 92 inches per full rotation. Over a mile, that translates to approximately 689 revolutions. If you swap to a significantly taller or shorter tire, those numbers shift—and so does your speedometer reading.

For reference, here’s the full dimension picture:

These figures assume a standard passenger (P-metric) tire. Light-truck versions—marked LT225/75R16—can differ slightly in diameter and weight.

Why Two 225/75R16 Tires Can Measure Differently

The size code defines the nominal dimensions, but the actual height varies by brand, model, and tire type. A mud-terrain tire with a chunky tread and a highway all-season tire in the same size will not measure identical.

Take two popular all-terrain examples from BFGoodrich. The All-Terrain T/A KO2 in LT225/75R16 lists a 29.2-inch diameter, while the newer All-Terrain T/A KO3 in the same size lists 29.3 inches. The KO2 weighs 42.5 lb and spins 710 revolutions per mile; the KO3 comes in lighter at 39 lb with 709 revolutions per mile. Both carry a 15/32-inch tread depth and an 80 psi max pressure, but their weights and diameters aren’t identical.

That example illustrates a bigger point: load rating, speed rating, tread depth, and weight all vary by model. In the LT category, the 115/112S load index on these BFGoodrich tires supports 2,680 lb per tire (single) and 2,470 lb (dual). P-metric versions of the same size often carry lower load capacities.

The approved rim width also depends on the tire’s construction. Passenger 225/75R16 tires typically fit wheels from 6 to 7.5 inches wide, while LT versions narrow that range to 6 to 7 inches. Before mounting, confirm your wheel width falls inside the tire’s approved range.

Pirelli’s US catalog confirms 225/75R16 and LT225/75R16 availability, including the SCORPION ATR all-terrain and CARRIER Van Summer Urban options. Michelin’s US dimension page likewise lists the size with width 225, ratio 75, and diameter 16, confirming it as a standard offering for the American market.

If you’re comparing specific models for your truck or SUV, our tested roundup of the best 225/75R16 all-terrain tires breaks down the top performers by tread life, off-road grip, and ride comfort.

The practical takeaway: treat 29.3 inches as the nominal height, but always check the manufacturer’s spec sheet for the exact model you’re considering. Fitment ultimately depends on your vehicle’s clearance, wheel width, offset, and the tire’s approved rim range—never assume a tire fits just because the size stamp matches.

FAQs

Is a 225/75R16 tire the same height in every brand?

No. The size code gives nominal dimensions, but actual height varies by brand and model. BFGoodrich’s KO2 measures 29.2 inches while the KO3 in the same LT225/75R16 size measures 29.3 inches. Tread design, casing construction, and load rating all influence the final number.

What does the 75 in 225/75R16 mean?

The 75 is the aspect ratio—the sidewall height expressed as a percentage of the tire’s width. With a 225 mm width, the sidewall is 75% of that, or about 168.75 mm (6.6 inches). It does not mean the sidewall is 75 inches or 75 millimeters tall.

Will a 225/75R16 tire fit my SUV or truck?

Fit depends on more than the size code. You need to confirm your vehicle has clearance for a 29.3-inch diameter tire, that your wheel width falls within the tire’s approved range (6–7.5 in for passenger versions), and that the offset doesn’t cause rubbing. Always check the manufacturer’s fitment guide.