285/40R19 tire size
285/40R19 is a metric size: 28.0" tall, 11.2" wide, on a 19" rim — about a 28x11.00R19. The sidewall is 4.5" and the tire turns 721 times per mile.
285/40R19 specs
| Overall diameter (height) | 27.98" · 711 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 4.49" · 114 mm (40% of width) |
| Rim diameter | 19" |
| Circumference | 87.89" · 2.232 m |
| Revolutions per mile | 721 (448 per km) |
| Inch (flotation) equivalent | 28x11.00R19 |
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" | +4.29% | -50 mm | 62.6 mph | compare → |
| 245/45R19 common | 27.68" | -1.06% | -40 mm | 59.4 mph | compare → |
| 245/40R19 common | 26.72" | -4.50% | -40 mm | 57.3 mph | compare → |
| 255/50R19 common | 29.04" | +3.80% | -30 mm | 62.3 mph | compare → |
| 255/40R19 common | 27.03" | -3.38% | -30 mm | 58.0 mph | compare → |
| 255/45R19 common | 28.04" | +0.21% | -30 mm | 60.1 mph | compare → |
| 275/35R19 common | 26.58" | -5.00% | -10 mm | 57.0 mph | compare → |
| 225/55R19 common | 28.74" | +2.74% | -60 mm | 61.6 mph | compare → |
| 275/40R19 common | 27.66" | -1.13% | -10 mm | 59.3 mph | compare → |
| 225/45R19 common | 26.97" | -3.59% | -60 mm | 57.8 mph | compare → |
| 235/50R19 common | 28.25" | +0.99% | -50 mm | 60.6 mph | compare → |
| 285/35R19 common | 26.85" | -4.01% | 0 mm | 57.6 mph | compare → |
| 235/45R19 common | 27.33" | -2.32% | -50 mm | 58.6 mph | compare → |
| 245/50R19 common | 28.65" | +2.39% | -40 mm | 61.4 mph | compare → |
| 265/40R19 | 27.35" | -2.25% | -20 mm | 58.6 mph | compare → |
| 325/30R19 | 26.68" | -4.64% | +40 mm | 57.2 mph | compare → |
| 275/45R19 | 28.74" | +2.74% | -10 mm | 61.6 mph | compare → |
| 295/35R19 | 27.13" | -3.03% | +10 mm | 58.2 mph | compare → |
| 285/45R19 | 29.10" | +4.01% | 0 mm | 62.4 mph | compare → |
| 345/30R19 | 27.15" | -2.96% | +60 mm | 58.2 mph | compare → |
| 295/40R19 | 28.29" | +1.13% | +10 mm | 60.7 mph | compare → |
| 265/45R19 | 28.39" | +1.48% | -20 mm | 60.9 mph | calculate → |
| 305/35R19 | 27.41" | -2.04% | +20 mm | 58.8 mph | calculate → |
| 155/70R19 | 27.54" | -1.55% | -130 mm | 59.1 mph | calculate → |
| 355/30R19 | 27.39" | -2.11% | +70 mm | 58.7 mph | calculate → |
| 215/50R19 | 27.46" | -1.83% | -70 mm | 58.9 mph | calculate → |
| 345/35R19 | 28.51" | +1.90% | +60 mm | 61.1 mph | calculate → |
| 175/60R19 | 27.27" | -2.53% | -110 mm | 58.5 mph | calculate → |
| 195/50R19 | 26.68" | -4.64% | -90 mm | 57.2 mph | calculate → |
| 315/35R19 | 27.68" | -1.06% | +30 mm | 59.4 mph | calculate → |
| 155/80R19 | 28.76" | +2.81% | -130 mm | 61.7 mph | calculate → |
| 315/40R19 | 28.92" | +3.38% | +30 mm | 62.0 mph | calculate → |
| 335/30R19 | 26.91" | -3.80% | +50 mm | 57.7 mph | calculate → |
| 225/50R19 | 27.86" | -0.42% | -60 mm | 59.7 mph | calculate → |
| 145/80R19 | 28.13" | +0.56% | -140 mm | 60.3 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 | |
|---|---|---|---|---|---|
| 235/55R18 common | 28.18" | +0.72% | -50 mm | 60.4 mph | compare → |
| 225/55R18 common | 27.74" | -0.83% | -60 mm | 59.5 mph | compare → |
| 245/40R20 common | 27.72" | -0.93% | -40 mm | 59.4 mph | compare → |
| 255/40R20 common | 28.03" | +0.20% | -30 mm | 60.1 mph | compare → |
| 285/35R20 common | 27.85" | -0.44% | 0 mm | 59.7 mph | compare → |
| 295/35R20 | 28.13" | +0.55% | +10 mm | 60.3 mph | compare → |
| 275/45R18 | 27.74" | -0.83% | -10 mm | 59.5 mph | compare → |
| 335/30R20 | 27.91" | -0.23% | +50 mm | 59.9 mph | calculate → |
| 345/30R20 | 28.15" | +0.62% | +60 mm | 60.4 mph | calculate → |
| 255/50R18 | 28.04" | +0.23% | -30 mm | 60.1 mph | calculate → |
| 315/40R18 | 27.92" | -0.20% | +30 mm | 59.9 mph | calculate → |
| 215/60R18 | 28.16" | +0.65% | -70 mm | 60.4 mph | calculate → |
| 28x12.00R18 | 28.00" | +0.08% | +20 mm | 60.1 mph | calculate → |
| 285/45R18 | 28.10" | +0.44% | 0 mm | 60.3 mph | calculate → |
| 145/85R18 | 27.70" | -0.97% | -140 mm | 59.4 mph | calculate → |
| 225/45R20 | 27.97" | -0.01% | -60 mm | 60.0 mph | calculate → |
| 28x10.00R18 | 28.00" | +0.08% | -31 mm | 60.1 mph | calculate → |
| 155/65R20 | 27.93" | -0.15% | -130 mm | 59.9 mph | calculate → |
| 165/60R20 | 27.80" | -0.65% | -120 mm | 59.6 mph | calculate → |
Try another size against 285/40R19
Questions
What size is 285/40R19 in inches?
285/40R19 is about 28.0" tall and 11.2" wide on a 19-inch rim — roughly a 28x11.00R19 in inch sizing.
What does 285/40R19 mean?
285 mm section width, sidewall 40% of the width (4.49"), radial construction, 19-inch rim.
What tire sizes are equivalent to 285/40R19?
On the same 19" rim, within 3% of the diameter: 255/45R19 (+0.21%), 225/50R19 (-0.42%), 145/80R19 (+0.56%), 235/50R19 (+0.99%), 245/45R19 (-1.06%), 315/35R19 (-1.06%).
How many revolutions per mile does a 285/40R19 tire make?
About 721 revolutions per mile (circumference 87.9").
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.