165/85R15 tire size in inches
A 165/85R15 tire measures
26.0" tall × 6.5" wide
5.52" sidewall on a 15" wheel. 774 revolutions per mile.
165/85R15 means a tire 165 mm wide, with sidewalls 85% as tall as the tire is wide (140 mm), radial construction (R), for a 15 inch wheel.
165/85R15 specs
| Overall diameter (height) | 26.04 inches (662 mm) |
|---|---|
| Section width | 6.50 inches (165 mm) |
| Sidewall height | 5.52 inches (140 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 81.8 inches (2,078 mm) |
| Revolutions per mile | 774 |
| Revolutions per kilometer | 481 |
| Approximate rim width | 4.5" to 6.0" |
| In inches (flotation style) | 26.0x6.5R15 |
| Aspect ratio | 85% |
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 165/85R15 on a 15" wheel
These 15" sizes are within 3% of 165/85R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/55R15 | 26.04" | 10.04" | 0.0% | 60.0 mph | Compare |
| 175/80R15 | 26.02" | 6.89" | −0.1% | 60.0 mph | Compare |
| 215/65R15 | 26.00" | 8.46" | −0.2% | 59.9 mph | Compare |
| 235/60R15 | 26.10" | 9.25" | +0.2% | 60.1 mph | Compare |
| 185/75R15 | 25.93" | 7.28" | −0.5% | 59.7 mph | Compare |
| 285/50R15 | 26.22" | 11.22" | +0.7% | 60.4 mph | Compare |
| 275/50R15 | 25.83" | 10.83" | −0.8% | 59.5 mph | Compare |
| 205/70R15 | 26.30" | 8.07" | +1.0% | 60.6 mph | Compare |
| 195/70R15 | 25.75" | 7.68" | −1.1% | 59.3 mph | Compare |
| 225/60R15 | 25.63" | 8.86" | −1.6% | 59.0 mph | Compare |
| 265/55R15 | 26.48" | 10.43" | +1.7% | 61.0 mph | Compare |
| 245/55R15 | 25.61" | 9.65" | −1.7% | 59.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 255/60R14 | 14" | 26.05" | 0.0% | Compare |
| 255/50R16 | 16" | 26.04" | 0.0% | Compare |
| 195/85R13 | 13" | 26.05" | 0.0% | Compare |
| 255/45R17 | 17" | 26.04" | 0.0% | Compare |
| 255/40R18 | 18" | 26.03" | 0.0% | Compare |
| 235/65R14 | 14" | 26.03" | −0.1% | Compare |
| 255/35R19 | 19" | 26.03" | −0.1% | Compare |
| 255/30R20 | 20" | 26.02" | −0.1% | Compare |
| 255/25R21 | 21" | 26.02" | −0.1% | Compare |
| 205/50R18 | 18" | 26.07" | +0.1% | Compare |
| 305/25R20 | 20" | 26.00" | −0.2% | Compare |
| 225/40R19 | 19" | 26.09" | +0.2% | Compare |
One size up or down
Compare 165/85R15 with another size
Questions
- How tall is a 165/85R15 tire?
- A 165/85R15 tire is 26.0 inches tall (662 mm), calculated from the size. It is 6.5 inches wide with 5.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 165/85R15 mean?
- 165/85R15 means a tire 165 mm wide, with sidewalls 85% as tall as the tire is wide (140 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 165/85R15 tire make?
- About 774 revolutions per mile, based on a circumference of 81.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 165/85R15 tire?
- Roughly 4.5" to 6.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/55R15 instead of 165/85R15?
- 255/55R15 is 0.00 inches (0.0%) 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.