Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 165/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 27.39 (695.8) | -2.25 (-57.2) -7.6% |
| Width inches (mm) | 9.65 (245) | 6.5 (165) | -3.15 (-80) -32.7% |
| Circum. inches (mm) | 93.13 (2365.62) | 86.06 (2185.92) | -7.07 (-179.7) -7.6% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.2 (132) | 0.37 (9.5) 7.8% |
| Revolutions per mile (km) | 680.31 (422.72) | 736.23 (457.47) | 55.93 (34.75) 8.2% |
165/80-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.48 mph (29.74 km/h) |
| 25 mph (40.23 km/h) | 23.1 mph (37.18 km/h) |
| 30 mph (48.28 km/h) | 27.72 mph (44.61 km/h) |
| 35 mph (56.33 km/h) | 32.34 mph (52.05 km/h) |
| 40 mph (64.37 km/h) | 36.96 mph (59.48 km/h) |
| 45 mph (72.42 km/h) | 41.58 mph (66.92 km/h) |
| 50 mph (80.47 km/h) | 46.2 mph (74.35 km/h) |
| 55 mph (88.51 km/h) | 50.82 mph (81.79 km/h) |
| 60 mph (96.56 km/h) | 55.44 mph (89.23 km/h) |
| 65 mph (104.61 km/h) | 60.06 mph (96.66 km/h) |
| 70 mph (112.65 km/h) | 64.68 mph (104.1 km/h) |
| 75 mph (120.7 km/h) | 69.3 mph (111.53 km/h) |
| 80 mph (128.75 km/h) | 73.92 mph (118.97 km/h) |
| 85 mph (136.79 km/h) | 78.54 mph (126.4 km/h) |
| 90 mph (144.84 km/h) | 83.16 mph (133.84 km/h) |
| 95 mph (152.89 km/h) | 87.78 mph (141.27 km/h) |
| 100 mph (160.93 km/h) | 92.4 mph (148.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1874 | 2177 | 2344 | 2448 | 2559 | 2639 | 2727 | 2830 | 2974 | 3117 | 3277 | 3404 | 3636 | 3891 | 4090 | 4218 | 4289 | 4552 | 4919 | 5716 |
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