175/80R19 tire size
175/80R19 is a metric size: 30.0" tall, 6.9" wide, on a 19" rim — about a 30x7.00R19. The sidewall is 5.5" and the tire turns 672 times per mile.
175/80R19 specs
| Overall diameter (height) | 30.02" · 763 mm |
|---|---|
| Section width | 6.89" · 175 mm |
| Sidewall height | 5.51" · 140 mm (80% of width) |
| Rim diameter | 19" |
| Circumference | 94.32" · 2.396 m |
| Revolutions per mile | 672 (417 per km) |
| Inch (flotation) equivalent | 30x7.00R19 |
Equivalent sizes on a 19" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/55R19 common | 29.18" | -2.82% | +60 mm | 58.3 mph | calculate → |
| 255/50R19 common | 29.04" | -3.28% | +80 mm | 58.0 mph | calculate → |
| 225/55R19 common | 28.74" | -4.26% | +50 mm | 57.4 mph | calculate → |
| 245/55R19 common | 29.61" | -1.38% | +70 mm | 59.2 mph | calculate → |
| 255/55R19 common | 30.04" | +0.07% | +80 mm | 60.0 mph | calculate → |
| 255/60R19 common | 31.05" | +3.41% | +80 mm | 62.0 mph | calculate → |
| 265/50R19 common | 29.43" | -1.97% | +90 mm | 58.8 mph | calculate → |
| 245/50R19 common | 28.65" | -4.59% | +70 mm | 57.2 mph | calculate → |
| 275/55R19 | 30.91" | +2.95% | +100 mm | 61.8 mph | calculate → |
| 275/45R19 | 28.74" | -4.26% | +100 mm | 57.4 mph | calculate → |
| 285/45R19 | 29.10" | -3.08% | +110 mm | 58.2 mph | calculate → |
| 275/50R19 | 29.83" | -0.66% | +100 mm | 59.6 mph | calculate → |
| 265/55R19 | 30.48" | +1.51% | +90 mm | 60.9 mph | calculate → |
| 235/60R19 | 30.10" | +0.26% | +60 mm | 60.2 mph | calculate → |
| 295/45R19 | 29.45" | -1.90% | +120 mm | 58.9 mph | calculate → |
| 235/65R19 | 31.03" | +3.34% | +60 mm | 62.0 mph | calculate → |
| 165/90R19 | 30.69" | +2.23% | -10 mm | 61.3 mph | calculate → |
| 315/40R19 | 28.92" | -3.67% | +140 mm | 57.8 mph | calculate → |
| 155/80R19 | 28.76" | -4.20% | -20 mm | 57.5 mph | calculate → |
Plus / minus sizing: 18" and 20" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 255/50R20 common | 30.04" | +0.05% | +80 mm | 60.0 mph | calculate → |
| 235/65R18 common | 30.03" | +0.01% | +60 mm | 60.0 mph | calculate → |
| 275/45R20 common | 29.74" | -0.93% | +100 mm | 59.4 mph | calculate → |
| 235/55R20 common | 30.18" | +0.51% | +60 mm | 60.3 mph | calculate → |
| 255/60R18 | 30.05" | +0.08% | +80 mm | 60.0 mph | calculate → |
| 285/45R20 | 30.10" | +0.25% | +110 mm | 60.1 mph | calculate → |
| 275/55R18 | 29.91" | -0.38% | +100 mm | 59.8 mph | calculate → |
Try another size against 175/80R19
Questions
What size is 175/80R19 in inches?
175/80R19 is about 30.0" tall and 6.9" wide on a 19-inch rim — roughly a 30x7.00R19 in inch sizing.
What does 175/80R19 mean?
175 mm section width, sidewall 80% of the width (5.51"), radial construction, 19-inch rim.
What tire sizes are equivalent to 175/80R19?
On the same 19" rim, within 3% of the diameter: 255/55R19 (+0.07%), 235/60R19 (+0.26%), 275/50R19 (-0.66%), 245/55R19 (-1.38%), 265/55R19 (+1.51%), 295/45R19 (-1.90%).
How many revolutions per mile does a 175/80R19 tire make?
About 672 revolutions per mile (circumference 94.3").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.