Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-19 | 155/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.76 (730.6) | 28.37 (720.7) | -0.39 (-9.9) -1.4% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 90.36 (2295.25) | 89.14 (2264.15) | -1.22 (-31.1) -1.4% |
| Sidewall Height inches (mm) | 4.88 (124) | 5.19 (131.75) | 0.31 (7.75) 6.3% |
| Revolutions per mile (km) | 701.16 (435.68) | 710.8 (441.67) | 9.63 (5.98) 1.4% |
155/85-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.75 km/h) |
| 25 mph (40.23 km/h) | 24.66 mph (39.69 km/h) |
| 30 mph (48.28 km/h) | 29.59 mph (47.63 km/h) |
| 35 mph (56.33 km/h) | 34.53 mph (55.56 km/h) |
| 40 mph (64.37 km/h) | 39.46 mph (63.5 km/h) |
| 45 mph (72.42 km/h) | 44.39 mph (71.44 km/h) |
| 50 mph (80.47 km/h) | 49.32 mph (79.38 km/h) |
| 55 mph (88.51 km/h) | 54.25 mph (87.31 km/h) |
| 60 mph (96.56 km/h) | 59.19 mph (95.25 km/h) |
| 65 mph (104.61 km/h) | 64.12 mph (103.19 km/h) |
| 70 mph (112.65 km/h) | 69.05 mph (111.13 km/h) |
| 75 mph (120.7 km/h) | 73.98 mph (119.07 km/h) |
| 80 mph (128.75 km/h) | 78.92 mph (127 km/h) |
| 85 mph (136.79 km/h) | 83.85 mph (134.94 km/h) |
| 90 mph (144.84 km/h) | 88.78 mph (142.88 km/h) |
| 95 mph (152.89 km/h) | 93.71 mph (150.82 km/h) |
| 100 mph (160.93 km/h) | 98.64 mph (158.75 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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