Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-17 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.73 (831.3) | 34.07 (865.5) | 1.35 (34.2) 4.1% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 102.82 (2611.61) | 107.05 (2719.05) | 4.23 (107.44) 4.1% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 7.04 (178.75) | -0.83 (-21) -10.5% |
| Revolutions per mile (km) | 616.23 (382.91) | 591.88 (367.78) | -24.35 (-15.13) -4% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.82 mph (33.51 km/h) |
| 25 mph (40.23 km/h) | 26.03 mph (41.89 km/h) |
| 30 mph (48.28 km/h) | 31.23 mph (50.27 km/h) |
| 35 mph (56.33 km/h) | 36.44 mph (58.64 km/h) |
| 40 mph (64.37 km/h) | 41.65 mph (67.02 km/h) |
| 45 mph (72.42 km/h) | 46.85 mph (75.4 km/h) |
| 50 mph (80.47 km/h) | 52.06 mph (83.78 km/h) |
| 55 mph (88.51 km/h) | 57.26 mph (92.16 km/h) |
| 60 mph (96.56 km/h) | 62.47 mph (100.53 km/h) |
| 65 mph (104.61 km/h) | 67.67 mph (108.91 km/h) |
| 70 mph (112.65 km/h) | 72.88 mph (117.29 km/h) |
| 75 mph (120.7 km/h) | 78.09 mph (125.67 km/h) |
| 80 mph (128.75 km/h) | 83.29 mph (134.04 km/h) |
| 85 mph (136.79 km/h) | 88.5 mph (142.42 km/h) |
| 90 mph (144.84 km/h) | 93.7 mph (150.8 km/h) |
| 95 mph (152.89 km/h) | 98.91 mph (159.18 km/h) |
| 100 mph (160.93 km/h) | 104.11 mph (167.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1750 | 1884 | 1968 | 2057 | 2122 | 2192 | 2275 | 2391 | 2506 | 2634 | 2737 | 2923 | 3128 | 3288 | 3391 | 3448 | 3660 | 3955 | 4596 |
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