225/45R19 tire size
225/45R19 is a metric size: 27.0" tall, 8.9" wide, on a 19" rim — about a 27x9.00R19. The sidewall is 4.0" and the tire turns 748 times per mile.
225/45R19 specs
| Overall diameter (height) | 26.97" · 685 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 3.99" · 101 mm (45% of width) |
| Rim diameter | 19" |
| Circumference | 84.74" · 2.152 m |
| Revolutions per mile | 748 (465 per km) |
| Inch (flotation) equivalent | 27x9.00R19 |
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 | |
|---|---|---|---|---|---|
| 245/45R19 common | 27.68" | +2.63% | +20 mm | 61.6 mph | compare → |
| 245/40R19 common | 26.72" | -0.95% | +20 mm | 59.4 mph | compare → |
| 235/40R19 common | 26.40" | -2.12% | +10 mm | 58.7 mph | compare → |
| 255/40R19 common | 27.03" | +0.22% | +30 mm | 60.1 mph | compare → |
| 255/35R19 common | 26.03" | -3.50% | +30 mm | 57.9 mph | compare → |
| 255/45R19 common | 28.04" | +3.94% | +30 mm | 62.4 mph | compare → |
| 275/35R19 common | 26.58" | -1.46% | +50 mm | 59.1 mph | compare → |
| 275/40R19 common | 27.66" | +2.55% | +50 mm | 61.5 mph | compare → |
| 245/35R19 common | 25.75" | -4.52% | +20 mm | 57.3 mph | compare → |
| 225/40R19 common | 26.09" | -3.28% | 0 mm | 58.0 mph | compare → |
| 235/50R19 common | 28.25" | +4.74% | +10 mm | 62.8 mph | compare → |
| 285/35R19 common | 26.85" | -0.44% | +60 mm | 59.7 mph | compare → |
| 235/45R19 common | 27.33" | +1.31% | +10 mm | 60.8 mph | compare → |
| 265/35R19 common | 26.30" | -2.48% | +40 mm | 58.5 mph | compare → |
| 285/30R19 | 25.73" | -4.60% | +60 mm | 57.2 mph | compare → |
| 305/30R19 | 26.20" | -2.85% | +80 mm | 58.3 mph | compare → |
| 285/40R19 | 27.98" | +3.72% | +60 mm | 62.2 mph | compare → |
| 295/30R19 | 25.97" | -3.72% | +70 mm | 57.8 mph | compare → |
| 325/30R19 | 26.68" | -1.09% | +100 mm | 59.3 mph | compare → |
| 265/40R19 | 27.35" | +1.39% | +40 mm | 60.8 mph | compare → |
| 295/35R19 | 27.13" | +0.58% | +70 mm | 60.4 mph | compare → |
| 345/30R19 | 27.15" | +0.66% | +120 mm | 60.4 mph | compare → |
| 315/30R19 | 26.44" | -1.97% | +90 mm | 58.8 mph | compare → |
| 295/40R19 | 28.29" | +4.89% | +70 mm | 62.9 mph | compare → |
| 305/35R19 | 27.41" | +1.61% | +80 mm | 61.0 mph | calculate → |
| 155/70R19 | 27.54" | +2.12% | -70 mm | 61.3 mph | calculate → |
| 355/30R19 | 27.39" | +1.53% | +130 mm | 60.9 mph | calculate → |
| 215/50R19 | 27.46" | +1.82% | -10 mm | 61.1 mph | calculate → |
| 195/50R19 | 26.68" | -1.09% | -30 mm | 59.3 mph | calculate → |
| 175/60R19 | 27.27" | +1.09% | -50 mm | 60.7 mph | calculate → |
| 335/30R19 | 26.91" | -0.22% | +110 mm | 59.9 mph | calculate → |
| 315/35R19 | 27.68" | +2.63% | +90 mm | 61.6 mph | calculate → |
| 225/50R19 | 27.86" | +3.28% | 0 mm | 62.0 mph | calculate → |
| 145/80R19 | 28.13" | +4.31% | -80 mm | 62.6 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 | |
|---|---|---|---|---|---|
| 225/50R18 common | 26.86" | -0.42% | 0 mm | 59.7 mph | compare → |
| 245/35R20 common | 26.75" | -0.82% | +20 mm | 59.5 mph | compare → |
| 255/35R20 common | 27.03" | +0.20% | +30 mm | 60.1 mph | compare → |
| 255/45R18 common | 27.04" | +0.23% | +30 mm | 60.1 mph | compare → |
| 285/30R20 common | 26.73" | -0.89% | +60 mm | 59.5 mph | compare → |
| 295/30R20 | 26.97" | -0.01% | +70 mm | 60.0 mph | compare → |
| 305/30R20 | 27.20" | +0.86% | +80 mm | 60.5 mph | compare → |
| 285/40R18 | 26.98" | +0.01% | +60 mm | 60.0 mph | calculate → |
| 345/25R20 | 26.79" | -0.67% | +120 mm | 59.6 mph | calculate → |
| 225/40R20 | 27.09" | +0.42% | 0 mm | 60.3 mph | calculate → |
| 325/35R18 | 26.96" | -0.06% | +100 mm | 60.0 mph | calculate → |
| 145/60R20 | 26.85" | -0.45% | -80 mm | 59.7 mph | calculate → |
| 165/70R18 | 27.09" | +0.45% | -60 mm | 60.3 mph | calculate → |
| 145/80R18 | 27.13" | +0.60% | -80 mm | 60.4 mph | calculate → |
| 195/60R18 | 27.21" | +0.89% | -30 mm | 60.5 mph | calculate → |
Try another size against 225/45R19
Questions
What size is 225/45R19 in inches?
225/45R19 is about 27.0" tall and 8.9" wide on a 19-inch rim — roughly a 27x9.00R19 in inch sizing.
What does 225/45R19 mean?
225 mm section width, sidewall 45% of the width (3.99"), radial construction, 19-inch rim.
What tire sizes are equivalent to 225/45R19?
On the same 19" rim, within 3% of the diameter: 255/40R19 (+0.22%), 335/30R19 (-0.22%), 285/35R19 (-0.44%), 295/35R19 (+0.58%), 345/30R19 (+0.66%), 245/40R19 (-0.95%).
How many revolutions per mile does a 225/45R19 tire make?
About 748 revolutions per mile (circumference 84.7").
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.