What is 265/75R15 in inches?

A 265/75R15 tire is 30.65 inches tall and 10.4 inches wide, with a 7.82-inch sidewall, mounted on a 15-inch wheel. In metric that is 779 mm tall and 265 mm wide. The circumference is 96.29 inches.

How tall is a 265/75R15 tire?

30.65 inches, or 779 mm. That is the overall diameter, wheel included. It turns about 658 times per mile, which is what your speedometer counts.

What do the numbers in 265/75R15 mean?

265 is the tread width in millimeters, 75 is the aspect ratio — the sidewall height as a percentage of the tread width — and 15 is the wheel diameter in inches. So the sidewall is 265 × 75% = 198.8 mm tall.

265/75R15

A 265/75R15 tire is 30.65 inches tall and 10.4 inches wide, with a 7.82-inch sidewall, mounted on a 15-inch wheel.

Overall diameter

30.65″

779 mm

Sidewall height

7.82″

198.8 mm

Tread width

265 mm

10.4″

Circumference

96.29″

8.0 ft

Revs per mile

658

409 per km

Wheel diameter

15″

aspect ratio 75%

Compare vs 195/65R15 Compare with a custom size

Cross-section

Overall diameter: 30.65″
Sidewall (each side): 7.82″
Wheel: 15″

265/75R15 in inches and millimeters

Every dimension of a 265/75R15, converted both ways. Calculated from the size code, accurate to about 1%.

Measurement	Inches	Millimeters
Overall diameter (height)	30.65″	779 mm
Tread width	10.4″	265 mm
Sidewall height	7.82″	198.8 mm
Wheel diameter	15″	381 mm
Circumference	96.29″	2446 mm

Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.

265/75R15 compared with other sizes

All 19 practical swaps involving 265/75R15 — diameter change, speedometer impact and a fit verdict for each.

265/75R15 → 245/75R16

245/75R16

Diameter +0.6% · This fits

265/75R15 → 265/70R16

265/70R16

Diameter +0.1% · This fits

265/75R15 → 265/70R15

265/70R15

Diameter +3.5% · Borderline. Check clearance first

265/70R15 → 265/75R15

265/70R15

Diameter −3.4% · Borderline. Check clearance first

265/70R16 → 265/75R15

265/70R16

Diameter −0.1% · This fits

265/65R17 → 265/75R15

265/65R17

Diameter −0.3% · This fits

245/70R17 → 265/75R15

245/70R17

Diameter −0.5% · This fits

245/75R16 → 265/75R15

245/75R16

Diameter −0.6% · This fits

255/70R17 → 265/75R15

255/70R17

Diameter +1.3% · This fits

275/65R17 → 265/75R15

275/65R17

Diameter +1.4% · This fits

265/70R17 → 265/75R15

265/70R17

Diameter +3.1% · Borderline. Check clearance first

255/70R16 → 265/75R15

255/70R16

Diameter −1.9% · This fits

255/65R17 → 265/75R15

255/65R17

Diameter −2.0% · This fits

265/75R16 → 265/75R15

265/75R16

Diameter +3.3% · Borderline. Check clearance first

245/75R17 → 265/75R15

245/75R17

Diameter +2.7% · This fits

245/65R17 → 265/75R15

245/65R17

Diameter −3.6% · Borderline. Check clearance first

245/70R16 → 265/75R15

245/70R16

Diameter −3.7% · Borderline. Check clearance first

265/75R15 → 265/65R17

265/65R17

Diameter +0.3% · This fits

265/75R15 → 195/65R15

195/65R15

Diameter +22.7% · Too big a jump

Common questions

What is 265/75R15 in inches?: A 265/75R15 tire is 30.65 inches tall and 10.4 inches wide, with a 7.82-inch sidewall, mounted on a 15-inch wheel. In metric that is 779 mm tall and 265 mm wide. The circumference is 96.29 inches.
How tall is a 265/75R15 tire?: 30.65 inches, or 779 mm. That is the overall diameter, wheel included. It turns about 658 times per mile, which is what your speedometer counts.
What do the numbers in 265/75R15 mean?: 265 is the tread width in millimeters, 75 is the aspect ratio — the sidewall height as a percentage of the tread width — and 15 is the wheel diameter in inches. So the sidewall is 265 × 75% = 198.8 mm tall.