345/30R19 tire size in inches

A 345/30R19 tire measures

27.1" tall × 13.6" wide

4.07" sidewall on a 19" wheel. 743 revolutions per mile.

345/30R19 means a tire 345 mm wide, with sidewalls 30% as tall as the tire is wide (103 mm), radial construction (R), for a 19 inch wheel.

27.1"19" rim4.1"13.6" wide
345/30R19: 27.1 inches tall, 13.6 inches wide, on a 19 inch rim, drawn to scale

345/30R19 specs

Overall diameter (height)27.15 inches (690 mm)
Section width13.58 inches (345 mm)
Sidewall height4.07 inches (103 mm)
Wheel (rim) diameter19 inches
Circumference85.3 inches (2,166 mm)
Revolutions per mile743
Revolutions per kilometer462
Approximate rim width11.5" to 13.0"
In inches (flotation style)27.1x13.6R19
Aspect ratio30%

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 345/30R19 on a 19" wheel

These 19" sizes are within 3% of 345/30R19's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
295/35R1927.13"11.61"−0.1%60.0 mphCompare
205/50R1927.07"8.07"−0.3%59.8 mphCompare
255/40R1927.03"10.04"−0.4%59.7 mphCompare
235/45R1927.33"9.25"+0.7%60.4 mphCompare
225/45R1926.97"8.86"−0.7%59.6 mphCompare
265/40R1927.35"10.43"+0.7%60.4 mphCompare
355/30R1927.39"13.98"+0.9%60.5 mphCompare
335/30R1926.91"13.19"−0.9%59.5 mphCompare
305/35R1927.41"12.01"+0.9%60.6 mphCompare
285/35R1926.85"11.22"−1.1%59.3 mphCompare
215/50R1927.46"8.46"+1.2%60.7 mphCompare
245/40R1926.72"9.65"−1.6%59.0 mphCompare

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

SizeWheelDiameterDifference
215/60R1717"27.16"0.0%Compare
225/80R1313"27.17"+0.1%Compare
235/55R1717"27.18"+0.1%Compare
205/75R1515"27.11"−0.2%Compare
185/70R1717"27.20"+0.2%Compare
235/60R1616"27.10"−0.2%Compare
225/35R2121"27.20"+0.2%Compare
315/25R2121"27.20"+0.2%Compare
285/45R1717"27.10"−0.2%Compare
305/30R2020"27.20"+0.2%Compare
195/60R1818"27.21"+0.2%Compare
225/40R2020"27.09"−0.2%Compare

One size up or down

Compare 345/30R19 with another size

With 355/30R19 tires, when your speedometer says 60 mph you are really going

60.5 mph

355/30R19 is +0.24 inches (+0.9%) in overall diameter. That is within the 3% most shops and makers allow.

345/30R19355/30R19Difference%
Overall diameter27.15"27.39"+0.24"+0.9%
Section width13.58"13.98"+0.39"+2.9%
Sidewall height4.07"4.19"+0.12"+2.9%
Circumference85.29"86.04"+0.74"+0.9%
Revolutions per mile742.9736.4−6.4−0.9%

Questions

How tall is a 345/30R19 tire?
A 345/30R19 tire is 27.1 inches tall (690 mm), calculated from the size. It is 13.6 inches wide with 4.1 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 345/30R19 mean?
345/30R19 means a tire 345 mm wide, with sidewalls 30% as tall as the tire is wide (103 mm), radial construction (R), for a 19 inch wheel.
How many revolutions per mile does a 345/30R19 tire make?
About 743 revolutions per mile, based on a circumference of 85.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 345/30R19 tire?
Roughly 11.5" to 13.0". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 295/35R19 instead of 345/30R19?
295/35R19 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.

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