305/40R19 tire size in inches
A 305/40R19 tire measures
28.6" tall × 12.0" wide
4.80" sidewall on a 19" wheel. 705 revolutions per mile.
305/40R19 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 19 inch wheel.
305/40R19 specs
| Overall diameter (height) | 28.61 inches (727 mm) |
|---|---|
| Section width | 12.01 inches (305 mm) |
| Sidewall height | 4.80 inches (122 mm) |
| Wheel (rim) diameter | 19 inches |
| Circumference | 89.9 inches (2,283 mm) |
| Revolutions per mile | 705 |
| Revolutions per kilometer | 438 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 28.6x12.0R19 |
| Aspect ratio | 40% |
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 305/40R19 on a 19" wheel
These 19" sizes are within 3% of 305/40R19's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/50R19 | 28.65" | 9.65" | +0.1% | 60.1 mph | Compare |
| 205/60R19 | 28.69" | 8.07" | +0.3% | 60.2 mph | Compare |
| 345/35R19 | 28.51" | 13.58" | −0.3% | 59.8 mph | Compare |
| 225/55R19 | 28.74" | 8.86" | +0.5% | 60.3 mph | Compare |
| 275/45R19 | 28.74" | 10.83" | +0.5% | 60.3 mph | Compare |
| 355/35R19 | 28.78" | 13.98" | +0.6% | 60.4 mph | Compare |
| 265/45R19 | 28.39" | 10.43" | −0.8% | 59.5 mph | Compare |
| 215/55R19 | 28.31" | 8.46" | −1.0% | 59.4 mph | Compare |
| 295/40R19 | 28.29" | 11.61" | −1.1% | 59.3 mph | Compare |
| 315/40R19 | 28.92" | 12.40" | +1.1% | 60.7 mph | Compare |
| 235/50R19 | 28.25" | 9.25" | −1.2% | 59.3 mph | Compare |
| 335/35R19 | 28.23" | 13.19" | −1.3% | 59.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 265/70R14 | 14" | 28.61" | 0.0% | Compare |
| 245/55R18 | 18" | 28.61" | 0.0% | Compare |
| 295/50R17 | 17" | 28.61" | 0.0% | Compare |
| 335/25R22 | 22" | 28.59" | 0.0% | Compare |
| 225/60R18 | 18" | 28.63" | +0.1% | Compare |
| 275/35R21 | 21" | 28.58" | −0.1% | Compare |
| 245/60R17 | 17" | 28.57" | −0.1% | Compare |
| 265/65R15 | 15" | 28.56" | −0.2% | Compare |
| 275/40R20 | 20" | 28.66" | +0.2% | Compare |
| 335/40R18 | 18" | 28.55" | −0.2% | Compare |
| 215/80R15 | 15" | 28.54" | −0.2% | Compare |
| 245/65R16 | 16" | 28.54" | −0.2% | Compare |
One size up or down
- 295/40R19narrower: 28.3" × 11.6"
- 315/40R19wider: 28.9" × 12.4"
- 305/35R19lower profile: 27.4" × 12.0"
- 305/45R19taller sidewall: 29.8" × 12.0"
Compare 305/40R19 with another size
Questions
- How tall is a 305/40R19 tire?
- A 305/40R19 tire is 28.6 inches tall (727 mm), calculated from the size. It is 12.0 inches wide with 4.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 305/40R19 mean?
- 305/40R19 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 19 inch wheel.
- How many revolutions per mile does a 305/40R19 tire make?
- About 705 revolutions per mile, based on a circumference of 89.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 305/40R19 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 245/50R19 instead of 305/40R19?
- 245/50R19 is +0.04 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.