145/80R17 tire size
145/80R17 is a metric size: 26.1" tall, 5.7" wide, on a 17" rim — about a 26x5.50R17. The sidewall is 4.6" and the tire turns 772 times per mile.
145/80R17 specs
| Overall diameter (height) | 26.13" · 664 mm |
|---|---|
| Section width | 5.71" · 145 mm |
| Sidewall height | 4.57" · 116 mm (80% of width) |
| Rim diameter | 17" |
| Circumference | 82.10" · 2.085 m |
| Revolutions per mile | 772 (480 per km) |
| Inch (flotation) equivalent | 26x5.50R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 225/45R17 common | 24.97" | -4.44% | +80 mm | 57.3 mph | calculate → |
| 225/50R17 common | 25.86" | -1.05% | +80 mm | 59.4 mph | calculate → |
| 225/55R17 common | 26.74" | +2.34% | +80 mm | 61.4 mph | calculate → |
| 235/55R17 common | 27.18" | +3.99% | +90 mm | 62.4 mph | calculate → |
| 205/50R17 common | 25.07" | -4.07% | +60 mm | 57.6 mph | calculate → |
| 215/55R17 common | 26.31" | +0.68% | +70 mm | 60.4 mph | calculate → |
| 215/50R17 common | 25.46" | -2.56% | +70 mm | 58.5 mph | calculate → |
| 235/45R17 common | 25.33" | -3.09% | +90 mm | 58.1 mph | calculate → |
| 245/45R17 common | 25.68" | -1.73% | +100 mm | 59.0 mph | calculate → |
| 215/60R17 common | 27.16" | +3.92% | +70 mm | 62.4 mph | calculate → |
| 235/50R17 common | 26.25" | +0.45% | +90 mm | 60.3 mph | calculate → |
| 255/40R17 common | 25.03" | -4.22% | +110 mm | 57.5 mph | calculate → |
| 205/55R17 | 25.88" | -0.98% | +60 mm | 59.4 mph | calculate → |
| 275/40R17 | 25.66" | -1.81% | +130 mm | 58.9 mph | calculate → |
| 245/50R17 | 26.65" | +1.96% | +100 mm | 61.2 mph | calculate → |
| 255/45R17 | 26.04" | -0.38% | +110 mm | 59.8 mph | calculate → |
| 315/35R17 | 25.68" | -1.73% | +170 mm | 59.0 mph | calculate → |
| 335/35R17 | 26.23" | +0.38% | +190 mm | 60.2 mph | calculate → |
| 195/60R17 | 26.21" | +0.30% | +50 mm | 60.2 mph | calculate → |
| 285/40R17 | 25.98" | -0.60% | +140 mm | 59.6 mph | calculate → |
| 155/70R17 | 25.54" | -2.26% | +10 mm | 58.6 mph | calculate → |
| 265/40R17 | 25.35" | -3.01% | +120 mm | 58.2 mph | calculate → |
| 255/50R17 | 27.04" | +3.46% | +110 mm | 62.1 mph | calculate → |
| 165/80R17 | 27.39" | +4.82% | +20 mm | 62.9 mph | calculate → |
| 175/65R17 | 25.96" | -0.68% | +30 mm | 59.6 mph | calculate → |
| 155/80R17 | 26.76" | +2.41% | +10 mm | 61.4 mph | calculate → |
| 295/35R17 | 25.13" | -3.84% | +150 mm | 57.7 mph | calculate → |
| 26x6.00R17 | 26.00" | -0.51% | +7 mm | 59.7 mph | calculate → |
| 185/60R17 | 25.74" | -1.51% | +40 mm | 59.1 mph | calculate → |
| 145/70R17 | 24.99" | -4.37% | 0 mm | 57.4 mph | calculate → |
| 145/90R17 | 27.28" | +4.37% | 0 mm | 62.6 mph | calculate → |
| 165/70R17 | 26.09" | -0.15% | +20 mm | 59.9 mph | calculate → |
| 295/40R17 | 26.29" | +0.60% | +150 mm | 60.4 mph | calculate → |
| 205/60R17 | 26.69" | +2.11% | +60 mm | 61.3 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 225/45R18 common | 25.97" | -0.62% | +80 mm | 59.6 mph | calculate → |
| 235/45R18 common | 26.33" | +0.74% | +90 mm | 60.4 mph | calculate → |
| 215/60R16 common | 26.16" | +0.09% | +70 mm | 60.1 mph | calculate → |
| 255/40R18 common | 26.03" | -0.39% | +110 mm | 59.8 mph | calculate → |
| 265/40R18 | 26.35" | +0.81% | +120 mm | 60.5 mph | calculate → |
| 295/35R18 | 26.13" | -0.02% | +150 mm | 60.0 mph | calculate → |
| 335/30R18 | 25.91" | -0.84% | +190 mm | 59.5 mph | calculate → |
| 255/50R16 | 26.04" | -0.36% | +110 mm | 59.8 mph | calculate → |
| 145/90R16 | 26.28" | +0.54% | 0 mm | 60.3 mph | calculate → |
| 235/55R16 | 26.18" | +0.17% | +90 mm | 60.1 mph | calculate → |
| 195/65R16 | 25.98" | -0.59% | +50 mm | 59.6 mph | calculate → |
| 26x12.00R18 | 26.00" | -0.51% | +160 mm | 59.7 mph | calculate → |
| 26x6.00R18 | 26.00" | -0.51% | +7 mm | 59.7 mph | calculate → |
| 26x8.00R18 | 26.00" | -0.51% | +58 mm | 59.7 mph | calculate → |
| 145/70R18 | 25.99" | -0.54% | 0 mm | 59.7 mph | calculate → |
| 345/30R18 | 26.15" | +0.06% | +200 mm | 60.0 mph | calculate → |
| 26x11.50R16 | 26.00" | -0.51% | +147 mm | 59.7 mph | calculate → |
| 315/40R16 | 25.92" | -0.81% | +170 mm | 59.5 mph | calculate → |
Try another size against 145/80R17
Questions
What size is 145/80R17 in inches?
145/80R17 is about 26.1" tall and 5.7" wide on a 17-inch rim — roughly a 26x5.50R17 in inch sizing.
What does 145/80R17 mean?
145 mm section width, sidewall 80% of the width (4.57"), radial construction, 17-inch rim.
What tire sizes are equivalent to 145/80R17?
On the same 17" rim, within 3% of the diameter: 165/70R17 (-0.15%), 195/60R17 (+0.30%), 255/45R17 (-0.38%), 335/35R17 (+0.38%), 235/50R17 (+0.45%), 26x6.00R17 (-0.51%).
How many revolutions per mile does a 145/80R17 tire make?
About 772 revolutions per mile (circumference 82.1").
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.