Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 145/80-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 28.13 (714.6) | 0.43 (10.9) 1.5% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 87.04 (2210.74) | 88.39 (2244.98) | 1.35 (34.24) 1.5% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 4.57 (116) | -0.29 (-7.25) -5.9% |
| Revolutions per mile (km) | 727.97 (452.34) | 716.86 (445.44) | -11.1 (-6.9) -1.5% |
145/80-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.31 mph (32.69 km/h) |
| 25 mph (40.23 km/h) | 25.39 mph (40.86 km/h) |
| 30 mph (48.28 km/h) | 30.46 mph (49.03 km/h) |
| 35 mph (56.33 km/h) | 35.54 mph (57.2 km/h) |
| 40 mph (64.37 km/h) | 40.62 mph (65.37 km/h) |
| 45 mph (72.42 km/h) | 45.7 mph (73.54 km/h) |
| 50 mph (80.47 km/h) | 50.77 mph (81.71 km/h) |
| 55 mph (88.51 km/h) | 55.85 mph (89.89 km/h) |
| 60 mph (96.56 km/h) | 60.93 mph (98.06 km/h) |
| 65 mph (104.61 km/h) | 66.01 mph (106.23 km/h) |
| 70 mph (112.65 km/h) | 71.08 mph (114.4 km/h) |
| 75 mph (120.7 km/h) | 76.16 mph (122.57 km/h) |
| 80 mph (128.75 km/h) | 81.24 mph (130.74 km/h) |
| 85 mph (136.79 km/h) | 86.32 mph (138.91 km/h) |
| 90 mph (144.84 km/h) | 91.39 mph (147.08 km/h) |
| 95 mph (152.89 km/h) | 96.47 mph (155.26 km/h) |
| 100 mph (160.93 km/h) | 101.55 mph (163.43 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1824 | 2119 | 2282 | 2383 | 2492 | 2570 | 2655 | 2756 | 2896 | 3035 | 3191 | 3315 | 3540 | 3788 | 3982 | 4107 | 4176 | 4433 | 4790 | 5566 |
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