145/80R16 tire size
145/80R16 is a metric size: 25.1" tall, 5.7" wide, on a 16" rim — about a 25x5.50R16. The sidewall is 4.6" and the tire turns 802 times per mile.
145/80R16 specs
| Overall diameter (height) | 25.13" · 638 mm |
|---|---|
| Section width | 5.71" · 145 mm |
| Sidewall height | 4.57" · 116 mm (80% of width) |
| Rim diameter | 16" |
| Circumference | 78.96" · 2.006 m |
| Revolutions per mile | 802 (499 per km) |
| Inch (flotation) equivalent | 25x5.50R16 |
Equivalent sizes on a 16" 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 | |
|---|---|---|---|---|---|
| 205/55R16 common | 24.88" | -1.02% | +60 mm | 59.4 mph | calculate → |
| 215/55R16 common | 25.31" | +0.70% | +70 mm | 60.4 mph | calculate → |
| 215/60R16 common | 26.16" | +4.07% | +70 mm | 62.4 mph | calculate → |
| 205/60R16 common | 25.69" | +2.19% | +60 mm | 61.3 mph | calculate → |
| 195/55R16 common | 24.44" | -2.74% | +50 mm | 58.4 mph | calculate → |
| 225/50R16 common | 24.86" | -1.10% | +80 mm | 59.3 mph | calculate → |
| 205/50R16 | 24.07" | -4.23% | +60 mm | 57.5 mph | calculate → |
| 225/55R16 | 25.74" | +2.43% | +80 mm | 61.5 mph | calculate → |
| 185/55R16 | 24.01" | -4.46% | +40 mm | 57.3 mph | calculate → |
| 245/45R16 | 24.68" | -1.80% | +100 mm | 58.9 mph | calculate → |
| 245/50R16 | 25.65" | +2.04% | +100 mm | 61.2 mph | calculate → |
| 195/60R16 | 25.21" | +0.31% | +50 mm | 60.2 mph | calculate → |
| 185/60R16 | 24.74" | -1.57% | +40 mm | 59.1 mph | calculate → |
| 255/50R16 | 26.04" | +3.60% | +110 mm | 62.2 mph | calculate → |
| 225/45R16 | 23.97" | -4.62% | +80 mm | 57.2 mph | calculate → |
| 145/90R16 | 26.28" | +4.54% | 0 mm | 62.7 mph | calculate → |
| 235/55R16 | 26.18" | +4.15% | +90 mm | 62.5 mph | calculate → |
| 275/45R16 | 25.74" | +2.43% | +130 mm | 61.5 mph | calculate → |
| 195/65R16 | 25.98" | +3.37% | +50 mm | 62.0 mph | calculate → |
| 175/60R16 | 24.27" | -3.45% | +30 mm | 57.9 mph | calculate → |
| 265/45R16 | 25.39" | +1.02% | +120 mm | 60.6 mph | calculate → |
| 215/50R16 | 24.46" | -2.66% | +70 mm | 58.4 mph | calculate → |
| 315/40R16 | 25.92" | +3.13% | +170 mm | 61.9 mph | calculate → |
| 26x11.50R16 | 26.00" | +3.45% | +147 mm | 62.1 mph | calculate → |
Plus / minus sizing: 15" and 17" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 225/45R17 common | 24.97" | -0.64% | +80 mm | 59.6 mph | calculate → |
| 205/50R17 common | 25.07" | -0.25% | +60 mm | 59.8 mph | calculate → |
| 235/45R17 common | 25.33" | +0.77% | +90 mm | 60.5 mph | calculate → |
| 195/65R15 common | 24.98" | -0.61% | +50 mm | 59.6 mph | calculate → |
| 255/40R17 common | 25.03" | -0.41% | +110 mm | 59.8 mph | calculate → |
| 215/60R15 | 25.16" | +0.09% | +70 mm | 60.1 mph | calculate → |
| 265/40R17 | 25.35" | +0.85% | +120 mm | 60.5 mph | calculate → |
| 295/35R17 | 25.13" | -0.02% | +150 mm | 60.0 mph | calculate → |
| 185/70R15 | 25.20" | +0.25% | +40 mm | 60.2 mph | calculate → |
| 145/70R17 | 24.99" | -0.56% | 0 mm | 59.7 mph | calculate → |
Try another size against 145/80R16
Questions
What size is 145/80R16 in inches?
145/80R16 is about 25.1" tall and 5.7" wide on a 16-inch rim — roughly a 25x5.50R16 in inch sizing.
What does 145/80R16 mean?
145 mm section width, sidewall 80% of the width (4.57"), radial construction, 16-inch rim.
What tire sizes are equivalent to 145/80R16?
On the same 16" rim, within 3% of the diameter: 195/60R16 (+0.31%), 215/55R16 (+0.70%), 205/55R16 (-1.02%), 265/45R16 (+1.02%), 225/50R16 (-1.10%), 185/60R16 (-1.57%).
How many revolutions per mile does a 145/80R16 tire make?
About 802 revolutions per mile (circumference 79.0").
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.