205/55R15 tire size
205/55R15 is a metric size: 23.9" tall, 8.1" wide, on a 15" rim — about a 24x8.00R15. The sidewall is 4.4" and the tire turns 845 times per mile.
205/55R15 specs
| Overall diameter (height) | 23.88" · 607 mm |
|---|---|
| Section width | 8.07" · 205 mm |
| Sidewall height | 4.44" · 113 mm (55% of width) |
| Rim diameter | 15" |
| Circumference | 75.01" · 1.905 m |
| Revolutions per mile | 845 (525 per km) |
| Inch (flotation) equivalent | 24x8.00R15 |
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" | +4.62% | -10 mm | 62.8 mph | calculate → |
| 185/65R15 common | 24.47" | +2.47% | -20 mm | 61.5 mph | calculate → |
| 185/60R15 common | 23.74" | -0.58% | -20 mm | 59.7 mph | calculate → |
| 195/60R15 common | 24.21" | +1.40% | -10 mm | 60.8 mph | calculate → |
| 175/65R15 | 23.96" | +0.33% | -30 mm | 60.2 mph | calculate → |
| 205/50R15 | 23.07" | -3.38% | 0 mm | 58.0 mph | calculate → |
| 195/55R15 | 23.44" | -1.81% | -10 mm | 58.9 mph | calculate → |
| 205/60R15 | 24.69" | +3.38% | 0 mm | 62.0 mph | calculate → |
| 185/55R15 | 23.01" | -3.63% | -20 mm | 57.8 mph | calculate → |
| 225/45R15 | 22.97" | -3.79% | +20 mm | 57.7 mph | calculate → |
| 225/50R15 | 23.86" | -0.08% | +20 mm | 60.0 mph | calculate → |
| 245/40R15 | 22.72" | -4.86% | +40 mm | 57.1 mph | calculate → |
| 345/35R15 | 24.51" | +2.64% | +140 mm | 61.6 mph | calculate → |
| 295/35R15 | 23.13" | -3.13% | +90 mm | 58.1 mph | calculate → |
| 245/50R15 | 24.65" | +3.22% | +40 mm | 61.9 mph | calculate → |
| 165/60R15 | 22.80" | -4.53% | -40 mm | 57.3 mph | calculate → |
| 235/50R15 | 24.25" | +1.57% | +30 mm | 60.9 mph | calculate → |
| 165/65R15 | 23.44" | -1.81% | -40 mm | 58.9 mph | calculate → |
| 175/60R15 | 23.27" | -2.56% | -30 mm | 58.5 mph | calculate → |
| 24.5x8.00R15 | 24.50" | +2.61% | -2 mm | 61.6 mph | calculate → |
| 155/80R15 | 24.76" | +3.71% | -50 mm | 62.2 mph | calculate → |
| 215/50R15 | 23.46" | -1.73% | +10 mm | 59.0 mph | calculate → |
| 175/70R15 | 24.65" | +3.22% | -30 mm | 61.9 mph | calculate → |
| 225/55R15 | 24.74" | +3.63% | +20 mm | 62.2 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 | |
|---|---|---|---|---|---|
| 205/50R16 | 24.07" | +0.81% | 0 mm | 60.5 mph | calculate → |
| 195/50R16 | 23.68" | -0.84% | -10 mm | 59.5 mph | calculate → |
| 185/55R16 | 24.01" | +0.56% | -20 mm | 60.3 mph | calculate → |
| 175/70R14 | 23.65" | -0.97% | -30 mm | 59.4 mph | calculate → |
| 225/45R16 | 23.97" | +0.40% | +20 mm | 60.2 mph | calculate → |
| 205/60R14 | 23.69" | -0.81% | 0 mm | 59.5 mph | calculate → |
| 195/65R14 | 23.98" | +0.43% | -10 mm | 60.3 mph | calculate → |
Try another size against 205/55R15
Questions
What size is 205/55R15 in inches?
205/55R15 is about 23.9" tall and 8.1" wide on a 15-inch rim — roughly a 24x8.00R15 in inch sizing.
What does 205/55R15 mean?
205 mm section width, sidewall 55% of the width (4.44"), radial construction, 15-inch rim.
What tire sizes are equivalent to 205/55R15?
On the same 15" rim, within 3% of the diameter: 225/50R15 (-0.08%), 175/65R15 (+0.33%), 185/60R15 (-0.58%), 195/60R15 (+1.40%), 235/50R15 (+1.57%), 215/50R15 (-1.73%).
How many revolutions per mile does a 205/55R15 tire make?
About 845 revolutions per mile (circumference 75.0").
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.