Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-19 | 155/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.89 (657.6) | 28.37 (720.7) | 2.48 (63.1) 9.6% |
| Width inches (mm) | 4.92 (125) | 6.1 (155) | 1.18 (30) 24% |
| Circum. inches (mm) | 81.34 (2065.91) | 89.14 (2264.15) | 7.8 (198.23) 9.6% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 5.19 (131.75) | 1.74 (44.25) 50.6% |
| Revolutions per mile (km) | 779 (484.05) | 710.8 (441.67) | -68.2 (-42.38) -8.8% |
155/85-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.92 mph (35.28 km/h) |
| 25 mph (40.23 km/h) | 27.4 mph (44.09 km/h) |
| 30 mph (48.28 km/h) | 32.88 mph (52.91 km/h) |
| 35 mph (56.33 km/h) | 38.36 mph (61.73 km/h) |
| 40 mph (64.37 km/h) | 43.84 mph (70.55 km/h) |
| 45 mph (72.42 km/h) | 49.32 mph (79.37 km/h) |
| 50 mph (80.47 km/h) | 54.8 mph (88.19 km/h) |
| 55 mph (88.51 km/h) | 60.28 mph (97.01 km/h) |
| 60 mph (96.56 km/h) | 65.76 mph (105.83 km/h) |
| 65 mph (104.61 km/h) | 71.24 mph (114.65 km/h) |
| 70 mph (112.65 km/h) | 76.72 mph (123.46 km/h) |
| 75 mph (120.7 km/h) | 82.2 mph (132.28 km/h) |
| 80 mph (128.75 km/h) | 87.68 mph (141.1 km/h) |
| 85 mph (136.79 km/h) | 93.16 mph (149.92 km/h) |
| 90 mph (144.84 km/h) | 98.64 mph (158.74 km/h) |
| 95 mph (152.89 km/h) | 104.12 mph (167.56 km/h) |
| 100 mph (160.93 km/h) | 109.6 mph (176.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1809 | 2101 | 2263 | 2363 | 2471 | 2548 | 2632 | 2733 | 2871 | 3010 | 3164 | 3287 | 3510 | 3756 | 3949 | 4072 | 4141 | 4395 | 4749 | 5519 |
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