165/80R15 tire size
165/80R15 is a metric size: 25.4" tall, 6.5" wide, on a 15" rim — about a 25.5x6.50R15. The sidewall is 5.2" and the tire turns 794 times per mile.
165/80R15 specs
| Overall diameter (height) | 25.39" · 645 mm |
|---|---|
| Section width | 6.50" · 165 mm |
| Sidewall height | 5.20" · 132 mm (80% of width) |
| Rim diameter | 15" |
| Circumference | 79.78" · 2.026 m |
| Revolutions per mile | 794 (494 per km) |
| Inch (flotation) equivalent | 25.5x6.50R15 |
Equivalent sizes on a 15" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 195/65R15 common | 24.98" | -1.63% | +30 mm | 59.0 mph | calculate → |
| 205/65R15 common | 25.49" | +0.39% | +40 mm | 60.2 mph | calculate → |
| 185/65R15 common | 24.47" | -3.64% | +20 mm | 57.8 mph | calculate → |
| 195/60R15 common | 24.21" | -4.65% | +30 mm | 57.2 mph | calculate → |
| 205/70R15 | 26.30" | +3.57% | +40 mm | 62.1 mph | calculate → |
| 205/60R15 | 24.69" | -2.79% | +40 mm | 58.3 mph | calculate → |
| 215/65R15 | 26.00" | +2.40% | +50 mm | 61.4 mph | calculate → |
| 215/60R15 | 25.16" | -0.93% | +50 mm | 59.4 mph | calculate → |
| 235/60R15 | 26.10" | +2.79% | +70 mm | 61.7 mph | calculate → |
| 195/70R15 | 25.75" | +1.40% | +30 mm | 60.8 mph | calculate → |
| 275/50R15 | 25.83" | +1.71% | +110 mm | 61.0 mph | calculate → |
| 225/60R15 | 25.63" | +0.93% | +60 mm | 60.6 mph | calculate → |
| 245/60R15 | 26.57" | +4.65% | +80 mm | 62.8 mph | calculate → |
| 295/50R15 | 26.61" | +4.81% | +130 mm | 62.9 mph | calculate → |
| 26x10.00R15 | 26.00" | +2.39% | +89 mm | 61.4 mph | calculate → |
| 26x8.50R15 | 26.00" | +2.39% | +51 mm | 61.4 mph | calculate → |
| 245/50R15 | 24.65" | -2.95% | +80 mm | 58.2 mph | calculate → |
| 345/35R15 | 24.51" | -3.49% | +180 mm | 57.9 mph | calculate → |
| 265/50R15 | 25.43" | +0.16% | +100 mm | 60.1 mph | calculate → |
| 185/70R15 | 25.20" | -0.78% | +20 mm | 59.5 mph | calculate → |
| 26x10.50R15 | 26.00" | +2.39% | +102 mm | 61.4 mph | calculate → |
| 26x12.00R15 | 26.00" | +2.39% | +140 mm | 61.4 mph | calculate → |
| 26x6.00R15 | 26.00" | +2.39% | -13 mm | 61.4 mph | calculate → |
| 26x7.50R15 | 26.00" | +2.39% | +26 mm | 61.4 mph | calculate → |
| 26x8.00R15 | 26.00" | +2.39% | +38 mm | 61.4 mph | calculate → |
| 155/80R15 | 24.76" | -2.48% | -10 mm | 58.5 mph | calculate → |
| 24.5x8.00R15 | 24.50" | -3.52% | +38 mm | 57.9 mph | calculate → |
| 235/50R15 | 24.25" | -4.50% | +70 mm | 57.3 mph | calculate → |
| 165R15 | 25.65" | +1.02% | 0 mm | 60.6 mph | calculate → |
| 26x11.50R15 | 26.00" | +2.39% | +127 mm | 61.4 mph | calculate → |
| 225/55R15 | 24.74" | -2.56% | +60 mm | 58.5 mph | calculate → |
| 175/70R15 | 24.65" | -2.95% | +10 mm | 58.2 mph | calculate → |
Plus / minus sizing: 14" and 16" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 215/55R16 common | 25.31" | -0.33% | +50 mm | 59.8 mph | calculate → |
| 245/50R16 | 25.65" | +0.99% | +80 mm | 60.6 mph | calculate → |
| 195/60R16 | 25.21" | -0.71% | +30 mm | 59.6 mph | calculate → |
| 195/75R14 | 25.52" | +0.48% | +30 mm | 60.3 mph | calculate → |
| 205/70R14 | 25.30" | -0.37% | +40 mm | 59.8 mph | calculate → |
| 245/60R14 | 25.57" | +0.71% | +80 mm | 60.4 mph | calculate → |
| 265/45R16 | 25.39" | -0.02% | +100 mm | 60.0 mph | calculate → |
| 175R14 | 25.30" | -0.37% | +10 mm | 59.8 mph | calculate → |
Try another size against 165/80R15
Questions
What size is 165/80R15 in inches?
165/80R15 is about 25.4" tall and 6.5" wide on a 15-inch rim — roughly a 25.5x6.50R15 in inch sizing.
What does 165/80R15 mean?
165 mm section width, sidewall 80% of the width (5.20"), radial construction, 15-inch rim.
What tire sizes are equivalent to 165/80R15?
On the same 15" rim, within 3% of the diameter: 265/50R15 (+0.16%), 205/65R15 (+0.39%), 185/70R15 (-0.78%), 225/60R15 (+0.93%), 215/60R15 (-0.93%), 165R15 (+1.02%).
How many revolutions per mile does a 165/80R15 tire make?
About 794 revolutions per mile (circumference 79.8").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.