275/40R19 tire size in inches

A 275/40R19 tire measures

27.7" tall × 10.8" wide

4.33" sidewall on a 19" wheel. 729 revolutions per mile.

275/40R19 means a tire 275 mm wide, with sidewalls 40% as tall as the tire is wide (110 mm), radial construction (R), for a 19 inch wheel.

27.7"19" rim4.3"10.8" wide
275/40R19: 27.7 inches tall, 10.8 inches wide, on a 19 inch rim, drawn to scale

275/40R19 specs

Overall diameter (height)27.66 inches (703 mm)
Section width10.83 inches (275 mm)
Sidewall height4.33 inches (110 mm)
Wheel (rim) diameter19 inches
Circumference86.9 inches (2,207 mm)
Revolutions per mile729
Revolutions per kilometer453
Approximate rim width9.0" to 10.5"
In inches (flotation style)27.7x10.8R19
Aspect ratio40%

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 275/40R19 on a 19" wheel

These 19" sizes are within 3% of 275/40R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
245/45R1927.68"9.65"+0.1%60.0 mphCompare
315/35R1927.68"12.40"+0.1%60.0 mphCompare
215/50R1927.46"8.46"−0.7%59.6 mphCompare
225/50R1927.86"8.86"+0.7%60.4 mphCompare
205/55R1927.88"8.07"+0.8%60.5 mphCompare
305/35R1927.41"12.01"−0.9%59.4 mphCompare
355/30R1927.39"13.98"−1.0%59.4 mphCompare
325/35R1927.96"12.80"+1.1%60.6 mphCompare
265/40R1927.35"10.43"−1.1%59.3 mphCompare
285/40R1927.98"11.22"+1.1%60.7 mphCompare
235/45R1927.33"9.25"−1.2%59.3 mphCompare
255/45R1928.04"10.04"+1.4%60.8 mphCompare

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

SizeWheelDiameterDifference
185/80R1616"27.65"0.0%Compare
245/50R1818"27.65"−0.1%Compare
325/30R2020"27.68"+0.1%Compare
205/60R1818"27.69"+0.1%Compare
225/60R1717"27.63"−0.1%Compare
215/75R1515"27.70"+0.1%Compare
215/45R2020"27.62"−0.2%Compare
295/50R1616"27.61"−0.2%Compare
245/55R1717"27.61"−0.2%Compare
285/25R2222"27.61"−0.2%Compare
175/85R1616"27.71"+0.2%Compare
305/40R1818"27.61"−0.2%Compare

One size up or down

Compare 275/40R19 with another size

With 285/40R19 tires, when your speedometer says 60 mph you are really going

60.7 mph

285/40R19 is +0.31 inches (+1.1%) in overall diameter. That is within the 3% most shops and makers allow.

275/40R19285/40R19Difference%
Overall diameter27.66"27.98"+0.31"+1.1%
Section width10.83"11.22"+0.39"+3.6%
Sidewall height4.33"4.49"+0.16"+3.6%
Circumference86.90"87.89"+0.99"+1.1%
Revolutions per mile729.1720.9−8.2−1.1%

Questions

How tall is a 275/40R19 tire?
A 275/40R19 tire is 27.7 inches tall (703 mm), calculated from the size. It is 10.8 inches wide with 4.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 275/40R19 mean?
275/40R19 means a tire 275 mm wide, with sidewalls 40% as tall as the tire is wide (110 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 275/40R19 tire make?
About 729 revolutions per mile, based on a circumference of 86.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 275/40R19 tire?
Roughly 9.0" to 10.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 245/45R19 instead of 275/40R19?
245/45R19 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

Browse