165R15 tire size
165R15 is a metric size: 25.7" tall, 6.5" wide, on a 15" rim — about a 25.5x6.50R15. The sidewall is 5.3" and the tire turns 786 times per mile.
165R15 specs
| Overall diameter (height) | 25.65" · 652 mm |
|---|---|
| Section width | 6.50" · 165 mm |
| Sidewall height | 5.33" · 135 mm (82% of width) |
| Rim diameter | 15" |
| Circumference | 80.59" · 2.047 m |
| Revolutions per mile | 786 (489 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" | -2.62% | +30 mm | 58.4 mph | calculate → |
| 205/65R15 common | 25.49" | -0.63% | +40 mm | 59.6 mph | calculate → |
| 185/65R15 common | 24.47" | -4.62% | +20 mm | 57.2 mph | calculate → |
| 215/70R15 | 26.85" | +4.67% | +50 mm | 62.8 mph | calculate → |
| 205/70R15 | 26.30" | +2.52% | +40 mm | 61.5 mph | calculate → |
| 205/60R15 | 24.69" | -3.78% | +40 mm | 57.7 mph | calculate → |
| 215/65R15 | 26.00" | +1.37% | +50 mm | 60.8 mph | calculate → |
| 215/60R15 | 25.16" | -1.93% | +50 mm | 58.8 mph | calculate → |
| 235/60R15 | 26.10" | +1.75% | +70 mm | 61.0 mph | calculate → |
| 195/70R15 | 25.75" | +0.37% | +30 mm | 60.2 mph | calculate → |
| 275/50R15 | 25.83" | +0.68% | +110 mm | 60.4 mph | calculate → |
| 225/60R15 | 25.63" | -0.09% | +60 mm | 59.9 mph | calculate → |
| 245/60R15 | 26.57" | +3.59% | +80 mm | 62.2 mph | calculate → |
| 295/50R15 | 26.61" | +3.74% | +130 mm | 62.2 mph | calculate → |
| 26x10.00R15 | 26.00" | +1.35% | +89 mm | 60.8 mph | calculate → |
| 26x8.50R15 | 26.00" | +1.35% | +51 mm | 60.8 mph | calculate → |
| 245/50R15 | 24.65" | -3.93% | +80 mm | 57.6 mph | calculate → |
| 345/35R15 | 24.51" | -4.47% | +180 mm | 57.3 mph | calculate → |
| 265/50R15 | 25.43" | -0.86% | +100 mm | 59.5 mph | calculate → |
| 26x10.50R15 | 26.00" | +1.35% | +102 mm | 60.8 mph | calculate → |
| 26x12.00R15 | 26.00" | +1.35% | +140 mm | 60.8 mph | calculate → |
| 26x6.00R15 | 26.00" | +1.35% | -13 mm | 60.8 mph | calculate → |
| 26x7.50R15 | 26.00" | +1.35% | +26 mm | 60.8 mph | calculate → |
| 26x8.00R15 | 26.00" | +1.35% | +38 mm | 60.8 mph | calculate → |
| 185/70R15 | 25.20" | -1.78% | +20 mm | 58.9 mph | calculate → |
| 155/80R15 | 24.76" | -3.47% | -10 mm | 57.9 mph | calculate → |
| 24.5x8.00R15 | 24.50" | -4.50% | +38 mm | 57.3 mph | calculate → |
| 165/80R15 | 25.39" | -1.01% | 0 mm | 59.4 mph | calculate → |
| 26x11.50R15 | 26.00" | +1.35% | +127 mm | 60.8 mph | calculate → |
| 225/55R15 | 24.74" | -3.55% | +60 mm | 57.9 mph | calculate → |
| 175/70R15 | 24.65" | -3.93% | +10 mm | 57.6 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 | |
|---|---|---|---|---|---|
| 205/60R16 common | 25.69" | +0.12% | +40 mm | 60.1 mph | calculate → |
| 225/55R16 | 25.74" | +0.35% | +60 mm | 60.2 mph | calculate → |
| 245/50R16 | 25.65" | -0.03% | +80 mm | 60.0 mph | calculate → |
| 215/70R14 | 25.85" | +0.77% | +50 mm | 60.5 mph | calculate → |
| 195/75R14 | 25.52" | -0.54% | +30 mm | 59.7 mph | calculate → |
| 275/45R16 | 25.74" | +0.35% | +110 mm | 60.2 mph | calculate → |
| 245/60R14 | 25.57" | -0.31% | +80 mm | 59.8 mph | calculate → |
Try another size against 165R15
Questions
What size is 165R15 in inches?
165R15 is about 25.7" tall and 6.5" wide on a 15-inch rim — roughly a 25.5x6.50R15 in inch sizing.
What does 165R15 mean?
165 mm section width, sidewall 82% of the width (5.33"), radial construction, 15-inch rim.
What tire sizes are equivalent to 165R15?
On the same 15" rim, within 3% of the diameter: 225/60R15 (-0.09%), 195/70R15 (+0.37%), 205/65R15 (-0.63%), 275/50R15 (+0.68%), 265/50R15 (-0.86%), 165/80R15 (-1.01%).
How many revolutions per mile does a 165R15 tire make?
About 786 revolutions per mile (circumference 80.6").
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.