Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 135/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 26.5 (673.2) | -3.19 (-81) -10.7% |
| Width inches (mm) | 6.5 (165) | 5.31 (135) | -1.18 (-30) -18.2% |
| Circum. inches (mm) | 93.28 (2369.39) | 83.26 (2114.92) | -10.02 (-254.47) -10.7% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4.25 (108) | -1.59 (-40.5) -27.3% |
| Revolutions per mile (km) | 679.22 (422.05) | 760.95 (472.83) | 81.72 (50.78) 12% |
135/80-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.85 mph (28.73 km/h) |
| 25 mph (40.23 km/h) | 22.32 mph (35.91 km/h) |
| 30 mph (48.28 km/h) | 26.78 mph (43.1 km/h) |
| 35 mph (56.33 km/h) | 31.24 mph (50.28 km/h) |
| 40 mph (64.37 km/h) | 35.7 mph (57.46 km/h) |
| 45 mph (72.42 km/h) | 40.17 mph (64.64 km/h) |
| 50 mph (80.47 km/h) | 44.63 mph (71.83 km/h) |
| 55 mph (88.51 km/h) | 49.09 mph (79.01 km/h) |
| 60 mph (96.56 km/h) | 53.56 mph (86.19 km/h) |
| 65 mph (104.61 km/h) | 58.02 mph (93.37 km/h) |
| 70 mph (112.65 km/h) | 62.48 mph (100.56 km/h) |
| 75 mph (120.7 km/h) | 66.95 mph (107.74 km/h) |
| 80 mph (128.75 km/h) | 71.41 mph (114.92 km/h) |
| 85 mph (136.79 km/h) | 75.87 mph (122.1 km/h) |
| 90 mph (144.84 km/h) | 80.33 mph (129.29 km/h) |
| 95 mph (152.89 km/h) | 84.8 mph (136.47 km/h) |
| 100 mph (160.93 km/h) | 89.26 mph (143.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
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