Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 155/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 27.98 (710.8) | 0.28 (7.1) 1% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 87.04 (2210.74) | 87.92 (2233.04) | 0.88 (22.31) 1% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 5.49 (139.5) | 0.64 (16.25) 13.2% |
| Revolutions per mile (km) | 727.97 (452.34) | 720.7 (447.82) | -7.27 (-4.52) -1% |
155/90-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.2 mph (32.51 km/h) |
| 25 mph (40.23 km/h) | 25.25 mph (40.64 km/h) |
| 30 mph (48.28 km/h) | 30.3 mph (48.77 km/h) |
| 35 mph (56.33 km/h) | 35.35 mph (56.9 km/h) |
| 40 mph (64.37 km/h) | 40.4 mph (65.02 km/h) |
| 45 mph (72.42 km/h) | 45.45 mph (73.15 km/h) |
| 50 mph (80.47 km/h) | 50.5 mph (81.28 km/h) |
| 55 mph (88.51 km/h) | 55.55 mph (89.41 km/h) |
| 60 mph (96.56 km/h) | 60.61 mph (97.54 km/h) |
| 65 mph (104.61 km/h) | 65.66 mph (105.66 km/h) |
| 70 mph (112.65 km/h) | 70.71 mph (113.79 km/h) |
| 75 mph (120.7 km/h) | 75.76 mph (121.92 km/h) |
| 80 mph (128.75 km/h) | 80.81 mph (130.05 km/h) |
| 85 mph (136.79 km/h) | 85.86 mph (138.17 km/h) |
| 90 mph (144.84 km/h) | 90.91 mph (146.3 km/h) |
| 95 mph (152.89 km/h) | 95.96 mph (154.43 km/h) |
| 100 mph (160.93 km/h) | 101.01 mph (162.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1834 | 2131 | 2294 | 2396 | 2505 | 2583 | 2669 | 2771 | 2911 | 3052 | 3208 | 3332 | 3559 | 3809 | 4004 | 4129 | 4199 | 4456 | 4815 | 5596 |
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