245/70R17 tire size in inches
A 245/70R17 tire measures
30.5" tall × 9.6" wide
6.75" sidewall on a 17" wheel. 661 revolutions per mile.
245/70R17 means a tire 245 mm wide, with sidewalls 70% as tall as the tire is wide (172 mm), radial construction (R), for a 17 inch wheel.
245/70R17 specs
| Overall diameter (height) | 30.50 inches (775 mm) |
|---|---|
| Section width | 9.65 inches (245 mm) |
| Sidewall height | 6.75 inches (172 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 95.8 inches (2,434 mm) |
| Revolutions per mile | 661 |
| Revolutions per kilometer | 411 |
| Approximate rim width | 6.5" to 8.0" |
| In inches (flotation style) | 30.5x9.6R17 |
| Aspect ratio | 70% |
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 245/70R17 on a 17" wheel
These 17" sizes are within 3% of 245/70R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 285/60R17 | 30.46" | 11.22" | −0.1% | 59.9 mph | Compare |
| 265/65R17 | 30.56" | 10.43" | +0.2% | 60.1 mph | Compare |
| 315/55R17 | 30.64" | 12.40" | +0.5% | 60.3 mph | Compare |
| 225/75R17 | 30.29" | 8.86" | −0.7% | 59.6 mph | Compare |
| 305/55R17 | 30.21" | 12.01" | −1.0% | 59.4 mph | Compare |
| 235/75R17 | 30.88" | 9.25" | +1.2% | 60.7 mph | Compare |
| 295/60R17 | 30.94" | 11.61" | +1.4% | 60.9 mph | Compare |
| 255/65R17 | 30.05" | 10.04" | −1.5% | 59.1 mph | Compare |
| 275/60R17 | 29.99" | 10.83" | −1.7% | 59.0 mph | Compare |
| 235/70R17 | 29.95" | 9.25" | −1.8% | 58.9 mph | Compare |
| 255/70R17 | 31.06" | 10.04" | +1.8% | 61.1 mph | Compare |
| 275/65R17 | 31.07" | 10.83" | +1.9% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 345/35R21 | 21" | 30.51" | 0.0% | Compare |
| 275/30R24 | 24" | 30.50" | 0.0% | Compare |
| 225/65R19 | 19" | 30.52" | 0.0% | Compare |
| 325/45R19 | 19" | 30.52" | 0.0% | Compare |
| 265/60R18 | 18" | 30.52" | +0.1% | Compare |
| 265/55R19 | 19" | 30.48" | −0.1% | Compare |
| 245/75R16 | 16" | 30.47" | −0.1% | Compare |
| 245/65R18 | 18" | 30.54" | +0.1% | Compare |
| 335/40R20 | 20" | 30.55" | +0.2% | Compare |
| 295/45R20 | 20" | 30.45" | −0.2% | Compare |
| 245/80R15 | 15" | 30.43" | −0.2% | Compare |
| 265/50R20 | 20" | 30.43" | −0.2% | Compare |
One size up or down
- 235/70R17narrower: 30.0" × 9.3"
- 255/70R17wider: 31.1" × 10.0"
- 245/65R17lower profile: 29.5" × 9.6"
- 245/75R17taller sidewall: 31.5" × 9.6"
Compare 245/70R17 with another size
Questions
- How tall is a 245/70R17 tire?
- A 245/70R17 tire is 30.5 inches tall (775 mm), calculated from the size. It is 9.6 inches wide with 6.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 245/70R17 mean?
- 245/70R17 means a tire 245 mm wide, with sidewalls 70% as tall as the tire is wide (172 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 245/70R17 tire make?
- About 661 revolutions per mile, based on a circumference of 95.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 245/70R17 tire?
- Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 285/60R17 instead of 245/70R17?
- 285/60R17 is −0.04 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.