235/30R19 tire size
235/30R19 is a metric size: 24.6" tall, 9.3" wide, on a 19" rim — about a 24.5x9.50R19. The sidewall is 2.8" and the tire turns 821 times per mile.
235/30R19 specs
| Overall diameter (height) | 24.55" · 624 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 2.78" · 71 mm (30% of width) |
| Rim diameter | 19" |
| Circumference | 77.13" · 1.959 m |
| Revolutions per mile | 821 (510 per km) |
| Inch (flotation) equivalent | 24.5x9.50R19 |
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 | |
|---|---|---|---|---|---|
| 245/35R19 common | 25.75" | +4.89% | +10 mm | 62.9 mph | calculate → |
| 235/35R19 common | 25.48" | +3.77% | 0 mm | 62.3 mph | calculate → |
| 285/30R19 | 25.73" | +4.81% | +50 mm | 62.9 mph | calculate → |
| 225/35R19 | 25.20" | +2.65% | -10 mm | 61.6 mph | calculate → |
| 255/30R19 | 25.02" | +1.92% | +20 mm | 61.2 mph | calculate → |
| 275/30R19 | 25.50" | +3.85% | +40 mm | 62.3 mph | calculate → |
| 265/30R19 | 25.26" | +2.89% | +30 mm | 61.7 mph | calculate → |
| 245/30R19 | 24.79" | +0.96% | +10 mm | 60.6 mph | calculate → |
| 295/25R19 | 24.81" | +1.04% | +60 mm | 60.6 mph | calculate → |
| 315/25R19 | 25.20" | +2.65% | +80 mm | 61.6 mph | calculate → |
| 215/35R19 | 24.93" | +1.52% | -20 mm | 60.9 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 | |
|---|---|---|---|---|---|
| 245/35R18 common | 24.75" | +0.82% | +10 mm | 60.5 mph | calculate → |
| 215/40R18 | 24.77" | +0.90% | -20 mm | 60.5 mph | calculate → |
| 285/30R18 | 24.73" | +0.74% | +50 mm | 60.4 mph | calculate → |
| 205/40R18 | 24.46" | -0.38% | -30 mm | 59.8 mph | calculate → |
| 235/35R18 | 24.48" | -0.30% | 0 mm | 59.8 mph | calculate → |
Try another size against 235/30R19
Questions
What size is 235/30R19 in inches?
235/30R19 is about 24.6" tall and 9.3" wide on a 19-inch rim — roughly a 24.5x9.50R19 in inch sizing.
What does 235/30R19 mean?
235 mm section width, sidewall 30% of the width (2.78"), radial construction, 19-inch rim.
What tire sizes are equivalent to 235/30R19?
On the same 19" rim, within 3% of the diameter: 245/30R19 (+0.96%), 295/25R19 (+1.04%), 215/35R19 (+1.52%), 255/30R19 (+1.92%), 225/35R19 (+2.65%), 315/25R19 (+2.65%).
How many revolutions per mile does a 235/30R19 tire make?
About 821 revolutions per mile (circumference 77.1").
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.