Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 135/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 26.5 (673.2) | -2.48 (-63) -8.6% |
| Width inches (mm) | 6.1 (155) | 5.31 (135) | -0.79 (-20) -12.9% |
| Circum. inches (mm) | 91.06 (2312.84) | 83.26 (2114.92) | -7.79 (-197.92) -8.6% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 4.25 (108) | -1.24 (-31.5) -22.6% |
| Revolutions per mile (km) | 695.83 (432.37) | 760.95 (472.83) | 65.12 (40.46) 9.4% |
135/80-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.29 mph (29.43 km/h) |
| 25 mph (40.23 km/h) | 22.86 mph (36.79 km/h) |
| 30 mph (48.28 km/h) | 27.43 mph (44.15 km/h) |
| 35 mph (56.33 km/h) | 32 mph (51.51 km/h) |
| 40 mph (64.37 km/h) | 36.58 mph (58.87 km/h) |
| 45 mph (72.42 km/h) | 41.15 mph (66.22 km/h) |
| 50 mph (80.47 km/h) | 45.72 mph (73.58 km/h) |
| 55 mph (88.51 km/h) | 50.29 mph (80.94 km/h) |
| 60 mph (96.56 km/h) | 54.87 mph (88.3 km/h) |
| 65 mph (104.61 km/h) | 59.44 mph (95.66 km/h) |
| 70 mph (112.65 km/h) | 64.01 mph (103.01 km/h) |
| 75 mph (120.7 km/h) | 68.58 mph (110.37 km/h) |
| 80 mph (128.75 km/h) | 73.15 mph (117.73 km/h) |
| 85 mph (136.79 km/h) | 77.73 mph (125.09 km/h) |
| 90 mph (144.84 km/h) | 82.3 mph (132.45 km/h) |
| 95 mph (152.89 km/h) | 86.87 mph (139.8 km/h) |
| 100 mph (160.93 km/h) | 91.44 mph (147.16 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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