315/25R19 tire size
315/25R19 is a metric size: 25.2" tall, 12.4" wide, on a 19" rim — about a 25x12.50R19. The sidewall is 3.1" and the tire turns 800 times per mile.
315/25R19 specs
| Overall diameter (height) | 25.20" · 640 mm |
|---|---|
| Section width | 12.40" · 315 mm |
| Sidewall height | 3.10" · 79 mm (25% of width) |
| Rim diameter | 19" |
| Circumference | 79.17" · 2.011 m |
| Revolutions per mile | 800 (497 per km) |
| Inch (flotation) equivalent | 25x12.50R19 |
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 | |
|---|---|---|---|---|---|
| 235/40R19 common | 26.40" | +4.76% | -80 mm | 62.9 mph | calculate → |
| 255/35R19 common | 26.03" | +3.28% | -60 mm | 62.0 mph | calculate → |
| 245/35R19 common | 25.75" | +2.19% | -70 mm | 61.3 mph | calculate → |
| 225/40R19 common | 26.09" | +3.52% | -90 mm | 62.1 mph | calculate → |
| 235/35R19 common | 25.48" | +1.09% | -80 mm | 60.7 mph | calculate → |
| 265/35R19 common | 26.30" | +4.37% | -50 mm | 62.6 mph | calculate → |
| 285/30R19 | 25.73" | +2.11% | -30 mm | 61.3 mph | calculate → |
| 225/35R19 | 25.20" | 0.00% | -90 mm | 60.0 mph | calculate → |
| 305/30R19 | 26.20" | +3.98% | -10 mm | 62.4 mph | calculate → |
| 255/30R19 | 25.02" | -0.70% | -60 mm | 59.6 mph | calculate → |
| 295/30R19 | 25.97" | +3.05% | -20 mm | 61.8 mph | calculate → |
| 275/30R19 | 25.50" | +1.17% | -40 mm | 60.7 mph | calculate → |
| 265/30R19 | 25.26" | +0.23% | -50 mm | 60.1 mph | calculate → |
| 315/30R19 | 26.44" | +4.92% | 0 mm | 63.0 mph | calculate → |
| 245/30R19 | 24.79" | -1.64% | -70 mm | 59.0 mph | calculate → |
| 295/25R19 | 24.81" | -1.56% | -20 mm | 59.1 mph | calculate → |
| 215/35R19 | 24.93" | -1.09% | -100 mm | 59.3 mph | calculate → |
| 235/30R19 | 24.55" | -2.58% | -80 mm | 58.5 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 | |
|---|---|---|---|---|---|
| 225/40R18 common | 25.09" | -0.45% | -90 mm | 59.7 mph | calculate → |
| 235/40R18 common | 25.40" | +0.80% | -80 mm | 60.5 mph | calculate → |
| 255/35R18 common | 25.03" | -0.69% | -60 mm | 59.6 mph | calculate → |
| 265/35R18 common | 25.30" | +0.41% | -50 mm | 60.2 mph | calculate → |
| 295/30R18 | 24.97" | -0.92% | -20 mm | 59.4 mph | calculate → |
| 315/30R18 | 25.44" | +0.95% | 0 mm | 60.6 mph | calculate → |
| 225/30R20 | 25.31" | +0.45% | -90 mm | 60.3 mph | calculate → |
| 305/30R18 | 25.20" | +0.02% | -10 mm | 60.0 mph | calculate → |
| 155/60R18 | 25.32" | +0.48% | -160 mm | 60.3 mph | calculate → |
| 275/25R20 | 25.41" | +0.84% | -40 mm | 60.5 mph | calculate → |
| 205/45R18 | 25.26" | +0.25% | -110 mm | 60.1 mph | calculate → |
| 215/30R20 | 25.08" | -0.48% | -100 mm | 59.7 mph | calculate → |
Try another size against 315/25R19
Questions
What size is 315/25R19 in inches?
315/25R19 is about 25.2" tall and 12.4" wide on a 19-inch rim — roughly a 25x12.50R19 in inch sizing.
What does 315/25R19 mean?
315 mm section width, sidewall 25% of the width (3.10"), radial construction, 19-inch rim.
What tire sizes are equivalent to 315/25R19?
On the same 19" rim, within 3% of the diameter: 225/35R19 (0.00%), 265/30R19 (+0.23%), 255/30R19 (-0.70%), 235/35R19 (+1.09%), 215/35R19 (-1.09%), 275/30R19 (+1.17%).
How many revolutions per mile does a 315/25R19 tire make?
About 800 revolutions per mile (circumference 79.2").
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.