Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-17 | 235/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.39 (695.8) | 34.8 (884) | 7.41 (188.2) 27% |
| Width inches (mm) | 6.5 (165) | 9.25 (235) | 2.76 (70) 42.4% |
| Circum. inches (mm) | 86.06 (2185.92) | 109.34 (2777.17) | 23.28 (591.25) 27% |
| Sidewall Height inches (mm) | 5.2 (132) | 7.4 (188) | 2.2 (56) 42.4% |
| Revolutions per mile (km) | 736.23 (457.47) | 579.49 (360.08) | -156.74 (-97.39) -21.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.41 mph (40.89 km/h) |
| 25 mph (40.23 km/h) | 31.76 mph (51.12 km/h) |
| 30 mph (48.28 km/h) | 38.11 mph (61.34 km/h) |
| 35 mph (56.33 km/h) | 44.47 mph (71.56 km/h) |
| 40 mph (64.37 km/h) | 50.82 mph (81.79 km/h) |
| 45 mph (72.42 km/h) | 57.17 mph (92.01 km/h) |
| 50 mph (80.47 km/h) | 63.52 mph (102.23 km/h) |
| 55 mph (88.51 km/h) | 69.88 mph (112.46 km/h) |
| 60 mph (96.56 km/h) | 76.23 mph (122.68 km/h) |
| 65 mph (104.61 km/h) | 82.58 mph (132.9 km/h) |
| 70 mph (112.65 km/h) | 88.93 mph (143.13 km/h) |
| 75 mph (120.7 km/h) | 95.29 mph (153.35 km/h) |
| 80 mph (128.75 km/h) | 101.64 mph (163.57 km/h) |
| 85 mph (136.79 km/h) | 107.99 mph (173.79 km/h) |
| 90 mph (144.84 km/h) | 114.34 mph (184.02 km/h) |
| 95 mph (152.89 km/h) | 120.7 mph (194.24 km/h) |
| 100 mph (160.93 km/h) | 127.05 mph (204.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1475 | 1713 | 1845 | 1927 | 2014 | 2077 | 2146 | 2228 | 2341 | 2454 | 2579 | 2680 | 2862 | 3062 | 3219 | 3320 | 3376 | 3583 | 3872 | 4499 |
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