165/65R15 tire size
165/65R15 is a metric size: 23.4" tall, 6.5" wide, on a 15" rim — about a 23.5x6.50R15. The sidewall is 4.2" and the tire turns 860 times per mile.
165/65R15 specs
| Overall diameter (height) | 23.44" · 595 mm |
|---|---|
| Section width | 6.50" · 165 mm |
| Sidewall height | 4.22" · 107 mm (65% of width) |
| Rim diameter | 15" |
| Circumference | 73.65" · 1.871 m |
| Revolutions per mile | 860 (535 per km) |
| Inch (flotation) equivalent | 23.5x6.50R15 |
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 | |
|---|---|---|---|---|---|
| 185/65R15 common | 24.47" | +4.37% | +20 mm | 62.6 mph | calculate → |
| 185/60R15 common | 23.74" | +1.26% | +20 mm | 60.8 mph | calculate → |
| 195/60R15 common | 24.21" | +3.27% | +30 mm | 62.0 mph | calculate → |
| 175/65R15 | 23.96" | +2.18% | +10 mm | 61.3 mph | calculate → |
| 205/50R15 | 23.07" | -1.60% | +40 mm | 59.0 mph | calculate → |
| 195/55R15 | 23.44" | 0.00% | +30 mm | 60.0 mph | calculate → |
| 185/55R15 | 23.01" | -1.85% | +20 mm | 58.9 mph | calculate → |
| 225/45R15 | 22.97" | -2.02% | +60 mm | 58.8 mph | calculate → |
| 195/50R15 | 22.68" | -3.27% | +30 mm | 58.0 mph | calculate → |
| 225/50R15 | 23.86" | +1.76% | +60 mm | 61.1 mph | calculate → |
| 245/40R15 | 22.72" | -3.11% | +80 mm | 58.1 mph | calculate → |
| 175/55R15 | 22.58" | -3.69% | +10 mm | 57.8 mph | calculate → |
| 145/65R15 | 22.42" | -4.37% | -20 mm | 57.4 mph | calculate → |
| 155/60R15 | 22.32" | -4.79% | -10 mm | 57.1 mph | calculate → |
| 295/35R15 | 23.13" | -1.34% | +130 mm | 59.2 mph | calculate → |
| 205/55R15 | 23.88" | +1.85% | +40 mm | 61.1 mph | calculate → |
| 165/60R15 | 22.80" | -2.77% | 0 mm | 58.3 mph | calculate → |
| 275/35R15 | 22.58" | -3.69% | +110 mm | 57.8 mph | calculate → |
| 345/35R15 | 24.51" | +4.53% | +180 mm | 62.7 mph | calculate → |
| 175/60R15 | 23.27" | -0.76% | +10 mm | 59.5 mph | calculate → |
| 235/50R15 | 24.25" | +3.44% | +70 mm | 62.1 mph | calculate → |
| 24.5x8.00R15 | 24.50" | +4.50% | +38 mm | 62.7 mph | calculate → |
| 215/50R15 | 23.46" | +0.08% | +50 mm | 60.1 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 | |
|---|---|---|---|---|---|
| 185/65R14 | 23.47" | +0.10% | +20 mm | 60.1 mph | calculate → |
| 195/50R16 | 23.68" | +0.99% | +30 mm | 60.6 mph | calculate → |
| 205/45R16 | 23.26" | -0.77% | +40 mm | 59.5 mph | calculate → |
| 175/70R14 | 23.65" | +0.86% | +10 mm | 60.5 mph | calculate → |
| 195/60R14 | 23.21" | -0.99% | +30 mm | 59.4 mph | calculate → |
| 215/45R16 | 23.62" | +0.74% | +50 mm | 60.4 mph | calculate → |
| 175/55R16 | 23.58" | +0.57% | +10 mm | 60.3 mph | calculate → |
| 185/50R16 | 23.28" | -0.69% | +20 mm | 59.6 mph | calculate → |
Try another size against 165/65R15
Questions
What size is 165/65R15 in inches?
165/65R15 is about 23.4" tall and 6.5" wide on a 15-inch rim — roughly a 23.5x6.50R15 in inch sizing.
What does 165/65R15 mean?
165 mm section width, sidewall 65% of the width (4.22"), radial construction, 15-inch rim.
What tire sizes are equivalent to 165/65R15?
On the same 15" rim, within 3% of the diameter: 195/55R15 (0.00%), 215/50R15 (+0.08%), 175/60R15 (-0.76%), 185/60R15 (+1.26%), 295/35R15 (-1.34%), 205/50R15 (-1.60%).
How many revolutions per mile does a 165/65R15 tire make?
About 860 revolutions per mile (circumference 73.7").
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.