305/40R17 tire size in inches
A 305/40R17 tire measures
26.6" tall × 12.0" wide
4.80" sidewall on a 17" wheel. 758 revolutions per mile.
305/40R17 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 17 inch wheel.
305/40R17 specs
| Overall diameter (height) | 26.61 inches (676 mm) |
|---|---|
| Section width | 12.01 inches (305 mm) |
| Sidewall height | 4.80 inches (122 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 83.6 inches (2,123 mm) |
| Revolutions per mile | 758 |
| Revolutions per kilometer | 471 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 26.6x12.0R17 |
| 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 305/40R17 on a 17" wheel
These 17" sizes are within 3% of 305/40R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/50R17 | 26.65" | 9.65" | +0.1% | 60.1 mph | Compare |
| 205/60R17 | 26.69" | 8.07" | +0.3% | 60.2 mph | Compare |
| 185/65R17 | 26.47" | 7.28" | −0.5% | 59.7 mph | Compare |
| 225/55R17 | 26.74" | 8.86" | +0.5% | 60.3 mph | Compare |
| 275/45R17 | 26.74" | 10.83" | +0.5% | 60.3 mph | Compare |
| 265/45R17 | 26.39" | 10.43" | −0.8% | 59.5 mph | Compare |
| 215/55R17 | 26.31" | 8.46" | −1.1% | 59.3 mph | Compare |
| 295/40R17 | 26.29" | 11.61" | −1.2% | 59.3 mph | Compare |
| 315/40R17 | 26.92" | 12.40" | +1.2% | 60.7 mph | Compare |
| 235/50R17 | 26.25" | 9.25" | −1.3% | 59.2 mph | Compare |
| 195/65R17 | 26.98" | 7.68" | +1.4% | 60.8 mph | Compare |
| 195/60R17 | 26.21" | 7.68" | −1.5% | 59.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/55R16 | 16" | 26.61" | 0.0% | Compare |
| 285/25R21 | 21" | 26.61" | 0.0% | Compare |
| 215/45R19 | 19" | 26.62" | 0.0% | Compare |
| 335/25R20 | 20" | 26.59" | 0.0% | Compare |
| 235/25R22 | 22" | 26.63" | +0.1% | Compare |
| 225/60R16 | 16" | 26.63" | +0.1% | Compare |
| 275/35R19 | 19" | 26.58" | −0.1% | Compare |
| 245/60R15 | 15" | 26.57" | −0.1% | Compare |
| 185/80R15 | 15" | 26.65" | +0.2% | Compare |
| 275/40R18 | 18" | 26.66" | +0.2% | Compare |
| 235/30R21 | 21" | 26.55" | −0.2% | Compare |
| 215/80R13 | 13" | 26.54" | −0.2% | Compare |
One size up or down
- 295/40R17narrower: 26.3" × 11.6"
- 315/40R17wider: 26.9" × 12.4"
- 305/35R17lower profile: 25.4" × 12.0"
- 305/45R17taller sidewall: 27.8" × 12.0"
Compare 305/40R17 with another size
Questions
- How tall is a 305/40R17 tire?
- A 305/40R17 tire is 26.6 inches tall (676 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 305/40R17 mean?
- 305/40R17 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 305/40R17 tire make?
- About 758 revolutions per mile, based on a circumference of 83.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 305/40R17 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 245/50R17 instead of 305/40R17?
- 245/50R17 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.