305/45R19 tire size in inches
A 305/45R19 tire measures
29.8" tall × 12.0" wide
5.40" sidewall on a 19" wheel. 677 revolutions per mile.
305/45R19 means a tire 305 mm wide, with sidewalls 45% as tall as the tire is wide (137 mm), radial construction (R), for a 19 inch wheel.
305/45R19 specs
| Overall diameter (height) | 29.81 inches (757 mm) |
|---|---|
| Section width | 12.01 inches (305 mm) |
| Sidewall height | 5.40 inches (137 mm) |
| Wheel (rim) diameter | 19 inches |
| Circumference | 93.6 inches (2,378 mm) |
| Revolutions per mile | 677 |
| Revolutions per kilometer | 420 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 29.8x12.0R19 |
| Aspect ratio | 45% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 305/45R19 on a 19" wheel
These 19" sizes are within 3% of 305/45R19's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/50R19 | 29.83" | 10.83" | +0.1% | 60.0 mph | Compare |
| 345/40R19 | 29.87" | 13.58" | +0.2% | 60.1 mph | Compare |
| 225/60R19 | 29.63" | 8.86" | −0.6% | 59.6 mph | Compare |
| 215/65R19 | 30.00" | 8.46" | +0.7% | 60.4 mph | Compare |
| 245/55R19 | 29.61" | 9.65" | −0.7% | 59.6 mph | Compare |
| 255/55R19 | 30.04" | 10.04" | +0.8% | 60.5 mph | Compare |
| 335/40R19 | 29.55" | 13.19" | −0.9% | 59.5 mph | Compare |
| 235/60R19 | 30.10" | 9.25" | +1.0% | 60.6 mph | Compare |
| 205/65R19 | 29.49" | 8.07" | −1.1% | 59.4 mph | Compare |
| 315/45R19 | 30.16" | 12.40" | +1.2% | 60.7 mph | Compare |
| 295/45R19 | 29.45" | 11.61" | −1.2% | 59.3 mph | Compare |
| 265/50R19 | 29.43" | 10.43" | −1.3% | 59.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 295/25R24 | 24" | 29.81" | 0.0% | Compare |
| 235/80R15 | 15" | 29.80" | 0.0% | Compare |
| 355/35R20 | 20" | 29.78" | −0.1% | Compare |
| 295/55R17 | 17" | 29.78" | −0.1% | Compare |
| 215/70R18 | 18" | 29.85" | +0.1% | Compare |
| 285/35R22 | 22" | 29.85" | +0.2% | Compare |
| 225/50R21 | 21" | 29.86" | +0.2% | Compare |
| 225/55R20 | 20" | 29.74" | −0.2% | Compare |
| 275/45R20 | 20" | 29.74" | −0.2% | Compare |
| 335/45R18 | 18" | 29.87" | +0.2% | Compare |
| 235/75R16 | 16" | 29.88" | +0.2% | Compare |
| 235/85R14 | 14" | 29.73" | −0.3% | Compare |
One size up or down
- 295/45R19narrower: 29.5" × 11.6"
- 315/45R19wider: 30.2" × 12.4"
- 305/40R19lower profile: 28.6" × 12.0"
- 305/50R19taller sidewall: 31.0" × 12.0"
Compare 305/45R19 with another size
Questions
- How tall is a 305/45R19 tire?
- A 305/45R19 tire is 29.8 inches tall (757 mm), calculated from the size. It is 12.0 inches wide with 5.4 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 305/45R19 mean?
- 305/45R19 means a tire 305 mm wide, with sidewalls 45% as tall as the tire is wide (137 mm), radial construction (R), for a 19 inch wheel.
- How many revolutions per mile does a 305/45R19 tire make?
- About 677 revolutions per mile, based on a circumference of 93.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 305/45R19 tire?
- Roughly 10.0" to 11.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 275/50R19 instead of 305/45R19?
- 275/50R19 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.