305/45R17 tire size in inches
A 305/45R17 tire measures
27.8" tall × 12.0" wide
5.40" sidewall on a 17" wheel. 725 revolutions per mile.
305/45R17 means a tire 305 mm wide, with sidewalls 45% as tall as the tire is wide (137 mm), radial construction (R), for a 17 inch wheel.
305/45R17 specs
| Overall diameter (height) | 27.81 inches (706 mm) |
|---|---|
| Section width | 12.01 inches (305 mm) |
| Sidewall height | 5.40 inches (137 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 87.4 inches (2,219 mm) |
| Revolutions per mile | 725 |
| Revolutions per kilometer | 451 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 27.8x12.0R17 |
| 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 305/45R17 on a 17" wheel
These 17" sizes are within 3% of 305/45R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/50R17 | 27.83" | 10.83" | +0.1% | 60.0 mph | Compare |
| 195/70R17 | 27.75" | 7.68" | −0.2% | 59.9 mph | Compare |
| 185/75R17 | 27.93" | 7.28" | +0.4% | 60.3 mph | Compare |
| 225/60R17 | 27.63" | 8.86" | −0.6% | 59.6 mph | Compare |
| 215/65R17 | 28.00" | 8.46" | +0.7% | 60.4 mph | Compare |
| 245/55R17 | 27.61" | 9.65" | −0.7% | 59.6 mph | Compare |
| 255/55R17 | 28.04" | 10.04" | +0.8% | 60.5 mph | Compare |
| 235/60R17 | 28.10" | 9.25" | +1.1% | 60.6 mph | Compare |
| 205/65R17 | 27.49" | 8.07" | −1.1% | 59.3 mph | Compare |
| 315/45R17 | 28.16" | 12.40" | +1.3% | 60.8 mph | Compare |
| 295/45R17 | 27.45" | 11.61" | −1.3% | 59.2 mph | Compare |
| 265/50R17 | 27.43" | 10.43" | −1.3% | 59.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 295/25R22 | 22" | 27.81" | 0.0% | Compare |
| 235/80R13 | 13" | 27.80" | 0.0% | Compare |
| 345/25R21 | 21" | 27.79" | −0.1% | Compare |
| 245/30R22 | 22" | 27.79" | −0.1% | Compare |
| 215/70R16 | 16" | 27.85" | +0.2% | Compare |
| 285/35R20 | 20" | 27.85" | +0.2% | Compare |
| 225/50R19 | 19" | 27.86" | +0.2% | Compare |
| 245/35R21 | 21" | 27.75" | −0.2% | Compare |
| 225/55R18 | 18" | 27.74" | −0.2% | Compare |
| 275/45R18 | 18" | 27.74" | −0.2% | Compare |
| 205/55R19 | 19" | 27.88" | +0.3% | Compare |
| 235/75R14 | 14" | 27.88" | +0.3% | Compare |
One size up or down
- 295/45R17narrower: 27.5" × 11.6"
- 315/45R17wider: 28.2" × 12.4"
- 305/40R17lower profile: 26.6" × 12.0"
- 305/50R17taller sidewall: 29.0" × 12.0"
Compare 305/45R17 with another size
Questions
- How tall is a 305/45R17 tire?
- A 305/45R17 tire is 27.8 inches tall (706 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 305/45R17 mean?
- 305/45R17 means a tire 305 mm wide, with sidewalls 45% as tall as the tire is wide (137 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 305/45R17 tire make?
- About 725 revolutions per mile, based on a circumference of 87.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 305/45R17 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 275/50R17 instead of 305/45R17?
- 275/50R17 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.