What is 255/35R19 in inches?

A 255/35R19 tire is 26.03 inches tall and 10.0 inches wide, with a 3.51-inch sidewall, mounted on a 19-inch wheel. In metric that is 661 mm tall and 255 mm wide. The circumference is 81.77 inches.

How tall is a 255/35R19 tire?

26.03 inches, or 661 mm. That is the overall diameter, wheel included. It turns about 775 times per mile, which is what your speedometer counts.

What do the numbers in 255/35R19 mean?

255 is the tread width in millimeters, 35 is the aspect ratio — the sidewall height as a percentage of the tread width — and 19 is the wheel diameter in inches. So the sidewall is 255 × 35% = 89.3 mm tall.

255/35R19

A 255/35R19 tire is 26.03 inches tall and 10.0 inches wide, with a 3.51-inch sidewall, mounted on a 19-inch wheel.

Common fitments: Mustang GT, M3/M4 (front)

Overall diameter

26.03″

661 mm

Sidewall height

3.51″

89.3 mm

Tread width

255 mm

10.0″

Circumference

81.77″

6.8 ft

Revs per mile

775

481 per km

Wheel diameter

19″

aspect ratio 35%

Compare vs 245/40R19 Compare with a custom size

Cross-section

Overall diameter: 26.03″
Sidewall (each side): 3.51″
Wheel: 19″

255/35R19 in inches and millimeters

Every dimension of a 255/35R19, converted both ways. Calculated from the size code, accurate to about 1%.

Measurement	Inches	Millimeters
Overall diameter (height)	26.03″	661 mm
Tread width	10.0″	255 mm
Sidewall height	3.51″	89.3 mm
Wheel diameter	19″	483 mm
Circumference	81.77″	2077 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.

255/35R19 compared with other sizes

All 24 practical swaps involving 255/35R19 — diameter change, speedometer impact and a fit verdict for each.

255/35R19 → 225/50R17

225/50R17

Diameter +0.7% · This fits

255/35R19 → 225/45R18

225/45R18

Diameter +0.2% · This fits

255/35R19 → 235/45R18

235/45R18

Diameter −1.1% · This fits

255/35R19 → 245/40R18

245/40R18

Diameter +1.2% · This fits

255/35R19 → 235/40R19

235/40R19

Diameter −1.4% · This fits

255/35R19 → 245/35R19

245/35R19

Diameter +1.1% · This fits

255/35R19 → 245/40R19

245/40R19

Diameter −2.6% · This fits

245/35R19 → 255/35R19

245/35R19

Diameter −1.1% · This fits

235/40R19 → 255/35R19

235/40R19

Diameter +1.4% · This fits

255/40R19 → 255/35R19

255/40R19

Diameter +3.9% · Borderline. Check clearance first

245/40R19 → 255/35R19

245/40R19

Diameter +2.6% · This fits

255/40R18 → 255/35R19

255/40R18

Diameter +0.0% · This fits

235/45R19 → 255/35R19

235/45R19

Diameter +5.0% · Borderline. Check clearance first

225/45R18 → 255/35R19

225/45R18

Diameter −0.2% · This fits

225/50R17 → 255/35R19

225/50R17

Diameter −0.7% · This fits

215/55R17 → 255/35R19

215/55R17

Diameter +1.1% · This fits

235/45R18 → 255/35R19

235/45R18

Diameter +1.1% · This fits

245/40R18 → 255/35R19

245/40R18

Diameter −1.2% · This fits

245/45R17 → 255/35R19

245/45R17

Diameter −1.3% · This fits

215/50R17 → 255/35R19

215/50R17

Diameter −2.2% · This fits

235/40R18 → 255/35R19

235/40R18

Diameter −2.4% · This fits

255/35R19 → 255/40R19

255/40R19

Diameter −3.7% · Borderline. Check clearance first

255/35R19 → 255/40R18

255/40R18

Diameter −0.0% · This fits

255/35R19 → 235/45R19

235/45R19

Diameter −4.8% · Borderline. Check clearance first

Common questions

What is 255/35R19 in inches?: A 255/35R19 tire is 26.03 inches tall and 10.0 inches wide, with a 3.51-inch sidewall, mounted on a 19-inch wheel. In metric that is 661 mm tall and 255 mm wide. The circumference is 81.77 inches.
How tall is a 255/35R19 tire?: 26.03 inches, or 661 mm. That is the overall diameter, wheel included. It turns about 775 times per mile, which is what your speedometer counts.
What do the numbers in 255/35R19 mean?: 255 is the tread width in millimeters, 35 is the aspect ratio — the sidewall height as a percentage of the tread width — and 19 is the wheel diameter in inches. So the sidewall is 255 × 35% = 89.3 mm tall.