255/25R19 tire size in inches

A 255/25R19 tire measures

24.0" tall × 10.0" wide

2.51" sidewall on a 19" wheel. 840 revolutions per mile.

255/25R19 means a tire 255 mm wide, with sidewalls 25% as tall as the tire is wide (64 mm), radial construction (R), for a 19 inch wheel.

24.0"19" rim2.5"10.0" wide
255/25R19: 24.0 inches tall, 10.0 inches wide, on a 19 inch rim, drawn to scale

255/25R19 specs

Overall diameter (height)24.02 inches (610 mm)
Section width10.04 inches (255 mm)
Sidewall height2.51 inches (64 mm)
Wheel (rim) diameter19 inches
Circumference75.5 inches (1,917 mm)
Revolutions per mile840
Revolutions per kilometer522
Approximate rim width8.5" to 10.0"
In inches (flotation style)24.0x10.0R19
Aspect ratio25%

Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.

Sizes that can replace 255/25R19 on a 19" wheel

These 19" sizes are within 3% of 255/25R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
215/30R1924.08"8.46"+0.2%60.1 mphCompare
205/30R1923.84"8.07"−0.7%59.6 mphCompare
245/25R1923.82"9.65"−0.8%59.5 mphCompare
265/25R1924.22"10.43"+0.8%60.5 mphCompare
225/30R1924.31"8.86"+1.2%60.7 mphCompare
235/25R1923.63"9.25"−1.6%59.0 mphCompare
275/25R1924.41"10.83"+1.6%61.0 mphCompare
235/30R1924.55"9.25"+2.2%61.3 mphCompare
225/25R1923.43"8.86"−2.5%58.5 mphCompare
285/25R1924.61"11.22"+2.5%61.5 mphCompare
205/35R1924.65"8.07"+2.6%61.6 mphCompare

Same height on other wheel sizes (plus and minus sizing)

SizeWheelDiameterDifference
175/80R1313"24.02"0.0%Compare
185/55R1616"24.01"0.0%Compare
255/35R1717"24.03"0.0%Compare
255/40R1616"24.03"0.0%Compare
215/65R1313"24.00"−0.1%Compare
255/45R1515"24.04"+0.1%Compare
165/85R1313"24.04"+0.1%Compare
195/65R1414"23.98"−0.2%Compare
225/45R1616"23.97"−0.2%Compare
205/50R1616"24.07"+0.2%Compare
175/65R1515"23.96"−0.3%Compare
225/40R1717"24.09"+0.3%Compare

One size up or down

Compare 255/25R19 with another size

With 265/25R19 tires, when your speedometer says 60 mph you are really going

60.5 mph

265/25R19 is +0.20 inches (+0.8%) in overall diameter. That is within the 3% most shops and makers allow.

255/25R19265/25R19Difference%
Overall diameter24.02"24.22"+0.20"+0.8%
Section width10.04"10.43"+0.39"+3.9%
Sidewall height2.51"2.61"+0.10"+3.9%
Circumference75.46"76.08"+0.62"+0.8%
Revolutions per mile839.6832.8−6.8−0.8%

Questions

How tall is a 255/25R19 tire?
A 255/25R19 tire is 24.0 inches tall (610 mm), calculated from the size. It is 10.0 inches wide with 2.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 255/25R19 mean?
255/25R19 means a tire 255 mm wide, with sidewalls 25% as tall as the tire is wide (64 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 255/25R19 tire make?
About 840 revolutions per mile, based on a circumference of 75.5 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 255/25R19 tire?
Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 215/30R19 instead of 255/25R19?
215/30R19 is +0.06 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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