155/80R15 tire size
155/80R15 is a metric size: 24.8" tall, 6.1" wide, on a 15" rim — about a 25x6.00R15. The sidewall is 4.9" and the tire turns 814 times per mile.
155/80R15 specs
| Overall diameter (height) | 24.76" · 629 mm |
|---|---|
| Section width | 6.10" · 155 mm |
| Sidewall height | 4.88" · 124 mm (80% of width) |
| Rim diameter | 15" |
| Circumference | 77.80" · 1.976 m |
| Revolutions per mile | 814 (506 per km) |
| Inch (flotation) equivalent | 25x6.00R15 |
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" | +0.87% | +40 mm | 60.5 mph | calculate → |
| 205/65R15 common | 25.49" | +2.94% | +50 mm | 61.8 mph | calculate → |
| 185/65R15 common | 24.47" | -1.19% | +30 mm | 59.3 mph | calculate → |
| 195/60R15 common | 24.21" | -2.23% | +40 mm | 58.7 mph | calculate → |
| 185/60R15 common | 23.74" | -4.13% | +30 mm | 57.5 mph | calculate → |
| 175/65R15 | 23.96" | -3.26% | +20 mm | 58.0 mph | calculate → |
| 205/60R15 | 24.69" | -0.32% | +50 mm | 59.8 mph | calculate → |
| 215/60R15 | 25.16" | +1.59% | +60 mm | 61.0 mph | calculate → |
| 225/50R15 | 23.86" | -3.66% | +70 mm | 57.8 mph | calculate → |
| 195/70R15 | 25.75" | +3.97% | +40 mm | 62.4 mph | calculate → |
| 275/50R15 | 25.83" | +4.29% | +120 mm | 62.6 mph | calculate → |
| 225/60R15 | 25.63" | +3.50% | +70 mm | 62.1 mph | calculate → |
| 26x10.00R15 | 26.00" | +4.99% | +99 mm | 63.0 mph | calculate → |
| 245/50R15 | 24.65" | -0.48% | +90 mm | 59.7 mph | calculate → |
| 345/35R15 | 24.51" | -1.03% | +190 mm | 59.4 mph | calculate → |
| 205/55R15 | 23.88" | -3.58% | +50 mm | 57.9 mph | calculate → |
| 26x8.50R15 | 26.00" | +4.99% | +61 mm | 63.0 mph | calculate → |
| 24.5x8.00R15 | 24.50" | -1.07% | +48 mm | 59.4 mph | calculate → |
| 185/70R15 | 25.20" | +1.75% | +30 mm | 61.0 mph | calculate → |
| 235/50R15 | 24.25" | -2.07% | +80 mm | 58.8 mph | calculate → |
| 265/50R15 | 25.43" | +2.70% | +110 mm | 61.6 mph | calculate → |
| 26x10.50R15 | 26.00" | +4.99% | +112 mm | 63.0 mph | calculate → |
| 26x12.00R15 | 26.00" | +4.99% | +150 mm | 63.0 mph | calculate → |
| 26x6.00R15 | 26.00" | +4.99% | -3 mm | 63.0 mph | calculate → |
| 26x7.50R15 | 26.00" | +4.99% | +36 mm | 63.0 mph | calculate → |
| 26x8.00R15 | 26.00" | +4.99% | +48 mm | 63.0 mph | calculate → |
| 225/55R15 | 24.74" | -0.08% | +70 mm | 60.0 mph | calculate → |
| 175/70R15 | 24.65" | -0.48% | +20 mm | 59.7 mph | calculate → |
| 165/80R15 | 25.39" | +2.54% | +10 mm | 61.5 mph | calculate → |
| 165R15 | 25.65" | +3.59% | +10 mm | 62.2 mph | calculate → |
| 26x11.50R15 | 26.00" | +4.99% | +137 mm | 63.0 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 | |
|---|---|---|---|---|---|
| 205/55R16 common | 24.88" | +0.46% | +50 mm | 60.3 mph | calculate → |
| 225/50R16 common | 24.86" | +0.38% | +70 mm | 60.2 mph | calculate → |
| 195/70R14 | 24.75" | -0.06% | +40 mm | 60.0 mph | calculate → |
| 245/45R16 | 24.68" | -0.33% | +90 mm | 59.8 mph | calculate → |
| 185/60R16 | 24.74" | -0.10% | +30 mm | 59.9 mph | calculate → |
| 225/60R14 | 24.63" | -0.54% | +70 mm | 59.7 mph | calculate → |
| 185/75R14 | 24.93" | +0.65% | +30 mm | 60.4 mph | calculate → |
Try another size against 155/80R15
Questions
What size is 155/80R15 in inches?
155/80R15 is about 24.8" tall and 6.1" wide on a 15-inch rim — roughly a 25x6.00R15 in inch sizing.
What does 155/80R15 mean?
155 mm section width, sidewall 80% of the width (4.88"), radial construction, 15-inch rim.
What tire sizes are equivalent to 155/80R15?
On the same 15" rim, within 3% of the diameter: 225/55R15 (-0.08%), 205/60R15 (-0.32%), 175/70R15 (-0.48%), 245/50R15 (-0.48%), 195/65R15 (+0.87%), 345/35R15 (-1.03%).
How many revolutions per mile does a 155/80R15 tire make?
About 814 revolutions per mile (circumference 77.8").
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.