235/45R19 tire size
235/45R19 is a metric size: 27.3" tall, 9.3" wide, on a 19" rim — about a 27.5x9.50R19. The sidewall is 4.2" and the tire turns 738 times per mile.
235/45R19 specs
| Overall diameter (height) | 27.33" · 694 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 4.16" · 106 mm (45% of width) |
| Rim diameter | 19" |
| Circumference | 85.85" · 2.181 m |
| Revolutions per mile | 738 (459 per km) |
| Inch (flotation) equivalent | 27.5x9.50R19 |
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" | +1.30% | +10 mm | 60.8 mph | compare → |
| 245/40R19 common | 26.72" | -2.23% | +10 mm | 58.7 mph | compare → |
| 235/40R19 common | 26.40" | -3.39% | 0 mm | 58.0 mph | compare → |
| 255/40R19 common | 27.03" | -1.08% | +20 mm | 59.4 mph | compare → |
| 255/35R19 common | 26.03" | -4.75% | +20 mm | 57.1 mph | compare → |
| 255/45R19 common | 28.04" | +2.59% | +20 mm | 61.6 mph | compare → |
| 275/35R19 common | 26.58" | -2.74% | +40 mm | 58.4 mph | compare → |
| 275/40R19 common | 27.66" | +1.22% | +40 mm | 60.7 mph | compare → |
| 225/40R19 common | 26.09" | -4.54% | -10 mm | 57.3 mph | compare → |
| 225/45R19 common | 26.97" | -1.30% | -10 mm | 59.2 mph | compare → |
| 235/50R19 common | 28.25" | +3.39% | 0 mm | 62.0 mph | compare → |
| 285/35R19 common | 26.85" | -1.73% | +50 mm | 59.0 mph | compare → |
| 265/35R19 common | 26.30" | -3.75% | +30 mm | 57.8 mph | compare → |
| 245/50R19 common | 28.65" | +4.83% | +10 mm | 62.9 mph | compare → |
| 305/30R19 | 26.20" | -4.11% | +70 mm | 57.5 mph | compare → |
| 285/40R19 | 27.98" | +2.38% | +50 mm | 61.4 mph | compare → |
| 295/30R19 | 25.97" | -4.97% | +60 mm | 57.0 mph | compare → |
| 265/40R19 | 27.35" | +0.07% | +30 mm | 60.0 mph | compare → |
| 325/30R19 | 26.68" | -2.38% | +90 mm | 58.6 mph | compare → |
| 295/35R19 | 27.13" | -0.72% | +60 mm | 59.6 mph | compare → |
| 345/30R19 | 27.15" | -0.65% | +110 mm | 59.6 mph | compare → |
| 315/30R19 | 26.44" | -3.24% | +80 mm | 58.1 mph | compare → |
| 295/40R19 | 28.29" | +3.53% | +60 mm | 62.1 mph | compare → |
| 305/35R19 | 27.41" | +0.29% | +70 mm | 60.2 mph | calculate → |
| 265/45R19 | 28.39" | +3.89% | +30 mm | 62.3 mph | calculate → |
| 155/70R19 | 27.54" | +0.79% | -80 mm | 60.5 mph | calculate → |
| 355/30R19 | 27.39" | +0.22% | +120 mm | 60.1 mph | calculate → |
| 215/50R19 | 27.46" | +0.50% | -20 mm | 60.3 mph | calculate → |
| 345/35R19 | 28.51" | +4.32% | +110 mm | 62.6 mph | calculate → |
| 175/60R19 | 27.27" | -0.22% | -60 mm | 59.9 mph | calculate → |
| 195/50R19 | 26.68" | -2.38% | -40 mm | 58.6 mph | calculate → |
| 315/35R19 | 27.68" | +1.30% | +80 mm | 60.8 mph | calculate → |
| 335/30R19 | 26.91" | -1.51% | +100 mm | 59.1 mph | calculate → |
| 225/50R19 | 27.86" | +1.94% | -10 mm | 61.2 mph | calculate → |
| 145/80R19 | 28.13" | +2.95% | -90 mm | 61.8 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 | |
|---|---|---|---|---|---|
| 235/50R18 common | 27.25" | -0.27% | 0 mm | 59.8 mph | compare → |
| 275/35R20 common | 27.58" | +0.92% | +40 mm | 60.6 mph | compare → |
| 215/55R18 common | 27.31" | -0.06% | -20 mm | 60.0 mph | compare → |
| 265/35R20 common | 27.30" | -0.09% | +30 mm | 59.9 mph | compare → |
| 305/30R20 | 27.20" | -0.45% | +70 mm | 59.7 mph | compare → |
| 315/30R20 | 27.44" | +0.42% | +80 mm | 60.3 mph | compare → |
| 295/40R18 | 27.29" | -0.13% | +60 mm | 59.9 mph | compare → |
| 265/45R18 | 27.39" | +0.23% | +30 mm | 60.1 mph | compare → |
| 235/40R20 | 27.40" | +0.27% | 0 mm | 60.2 mph | calculate → |
| 345/35R18 | 27.51" | +0.66% | +110 mm | 60.4 mph | calculate → |
| 225/40R20 | 27.09" | -0.88% | -10 mm | 59.5 mph | calculate → |
| 155/60R20 | 27.32" | -0.01% | -80 mm | 60.0 mph | calculate → |
| 145/65R20 | 27.42" | +0.35% | -90 mm | 60.2 mph | calculate → |
| 145/80R18 | 27.13" | -0.71% | -90 mm | 59.6 mph | calculate → |
| 165/70R18 | 27.09" | -0.85% | -70 mm | 59.5 mph | calculate → |
| 175/55R20 | 27.58" | +0.92% | -60 mm | 60.6 mph | calculate → |
| 195/60R18 | 27.21" | -0.42% | -40 mm | 59.7 mph | calculate → |
Try another size against 235/45R19
Questions
What size is 235/45R19 in inches?
235/45R19 is about 27.3" tall and 9.3" wide on a 19-inch rim — roughly a 27.5x9.50R19 in inch sizing.
What does 235/45R19 mean?
235 mm section width, sidewall 45% of the width (4.16"), radial construction, 19-inch rim.
What tire sizes are equivalent to 235/45R19?
On the same 19" rim, within 3% of the diameter: 265/40R19 (+0.07%), 175/60R19 (-0.22%), 355/30R19 (+0.22%), 305/35R19 (+0.29%), 215/50R19 (+0.50%), 345/30R19 (-0.65%).
How many revolutions per mile does a 235/45R19 tire make?
About 738 revolutions per mile (circumference 85.8").
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.