285/45R19 tire size
285/45R19 is a metric size: 29.1" tall, 11.2" wide, on a 19" rim — about a 29x11.00R19. The sidewall is 5.0" and the tire turns 693 times per mile.
285/45R19 specs
| Overall diameter (height) | 29.10" · 739 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 5.05" · 128 mm (45% of width) |
| Rim diameter | 19" |
| Circumference | 91.42" · 2.322 m |
| Revolutions per mile | 693 (431 per km) |
| Inch (flotation) equivalent | 29x11.00R19 |
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" | +0.27% | -50 mm | 60.2 mph | compare → |
| 245/45R19 common | 27.68" | -4.87% | -40 mm | 57.1 mph | compare → |
| 255/50R19 common | 29.04" | -0.20% | -30 mm | 59.9 mph | compare → |
| 255/45R19 common | 28.04" | -3.65% | -30 mm | 57.8 mph | compare → |
| 225/55R19 common | 28.74" | -1.22% | -60 mm | 59.3 mph | compare → |
| 275/40R19 common | 27.66" | -4.94% | -10 mm | 57.0 mph | compare → |
| 235/50R19 common | 28.25" | -2.91% | -50 mm | 58.3 mph | compare → |
| 245/55R19 common | 29.61" | +1.76% | -40 mm | 61.1 mph | compare → |
| 255/55R19 common | 30.04" | +3.25% | -30 mm | 61.9 mph | compare → |
| 265/50R19 common | 29.43" | +1.15% | -20 mm | 60.7 mph | compare → |
| 245/50R19 common | 28.65" | -1.56% | -40 mm | 59.1 mph | compare → |
| 285/40R19 | 27.98" | -3.86% | 0 mm | 57.7 mph | compare → |
| 275/45R19 | 28.74" | -1.22% | -10 mm | 59.3 mph | compare → |
| 275/50R19 | 29.83" | +2.50% | -10 mm | 61.5 mph | compare → |
| 265/55R19 | 30.48" | +4.74% | -20 mm | 62.8 mph | compare → |
| 295/40R19 | 28.29" | -2.77% | +10 mm | 58.3 mph | compare → |
| 265/45R19 | 28.39" | -2.44% | -20 mm | 58.5 mph | calculate → |
| 235/60R19 | 30.10" | +3.45% | -50 mm | 62.1 mph | calculate → |
| 295/45R19 | 29.45" | +1.22% | +10 mm | 60.7 mph | calculate → |
| 345/35R19 | 28.51" | -2.03% | +60 mm | 58.8 mph | calculate → |
| 315/40R19 | 28.92" | -0.61% | +30 mm | 59.6 mph | calculate → |
| 155/80R19 | 28.76" | -1.15% | -130 mm | 59.3 mph | calculate → |
| 175/80R19 | 30.02" | +3.18% | -110 mm | 61.9 mph | calculate → |
| 315/35R19 | 27.68" | -4.87% | +30 mm | 57.1 mph | calculate → |
| 145/80R19 | 28.13" | -3.31% | -140 mm | 58.0 mph | calculate → |
| 225/50R19 | 27.86" | -4.26% | -60 mm | 57.4 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 | |
|---|---|---|---|---|---|
| 235/60R18 common | 29.10" | +0.01% | -50 mm | 60.0 mph | compare → |
| 255/45R20 common | 29.04" | -0.22% | -30 mm | 59.9 mph | compare → |
| 255/55R18 common | 29.04" | -0.19% | -30 mm | 59.9 mph | compare → |
| 295/40R20 | 29.29" | +0.66% | +10 mm | 60.4 mph | compare → |
| 285/40R20 | 28.98" | -0.42% | 0 mm | 59.7 mph | compare → |
| 235/50R20 | 29.25" | +0.53% | -50 mm | 60.3 mph | compare → |
| 155/90R18 | 28.98" | -0.39% | -130 mm | 59.8 mph | calculate → |
| 285/50R18 | 29.22" | +0.42% | 0 mm | 60.3 mph | calculate → |
| 325/35R20 | 28.96" | -0.49% | +40 mm | 59.7 mph | calculate → |
| 29x15.00R20 | 29.00" | -0.34% | +96 mm | 59.8 mph | calculate → |
| 29x18.00R20 | 29.00" | -0.34% | +172 mm | 59.8 mph | calculate → |
Try another size against 285/45R19
Questions
What size is 285/45R19 in inches?
285/45R19 is about 29.1" tall and 11.2" wide on a 19-inch rim — roughly a 29x11.00R19 in inch sizing.
What does 285/45R19 mean?
285 mm section width, sidewall 45% of the width (5.05"), radial construction, 19-inch rim.
What tire sizes are equivalent to 285/45R19?
On the same 19" rim, within 3% of the diameter: 255/50R19 (-0.20%), 235/55R19 (+0.27%), 315/40R19 (-0.61%), 155/80R19 (-1.15%), 265/50R19 (+1.15%), 225/55R19 (-1.22%).
How many revolutions per mile does a 285/45R19 tire make?
About 693 revolutions per mile (circumference 91.4").
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.