Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 255/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 30.05 (763.2) | 1.81 (46) 6.4% |
| Width inches (mm) | 12.8 (325) | 10.04 (255) | -2.76 (-70) -21.5% |
| Circum. inches (mm) | 88.71 (2253.15) | 94.4 (2397.66) | 5.69 (144.51) 6.4% |
| Sidewall Height inches (mm) | 5.12 (130) | 6.02 (153) | 0.91 (23) 17.7% |
| Revolutions per mile (km) | 714.26 (443.82) | 671.21 (417.07) | -43.05 (-26.75) -6% |
255/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.28 mph (34.25 km/h) |
| 25 mph (40.23 km/h) | 26.6 mph (42.81 km/h) |
| 30 mph (48.28 km/h) | 31.92 mph (51.38 km/h) |
| 35 mph (56.33 km/h) | 37.24 mph (59.94 km/h) |
| 40 mph (64.37 km/h) | 42.57 mph (68.5 km/h) |
| 45 mph (72.42 km/h) | 47.89 mph (77.07 km/h) |
| 50 mph (80.47 km/h) | 53.21 mph (85.63 km/h) |
| 55 mph (88.51 km/h) | 58.53 mph (94.19 km/h) |
| 60 mph (96.56 km/h) | 63.85 mph (102.75 km/h) |
| 65 mph (104.61 km/h) | 69.17 mph (111.32 km/h) |
| 70 mph (112.65 km/h) | 74.49 mph (119.88 km/h) |
| 75 mph (120.7 km/h) | 79.81 mph (128.44 km/h) |
| 80 mph (128.75 km/h) | 85.13 mph (137.01 km/h) |
| 85 mph (136.79 km/h) | 90.45 mph (145.57 km/h) |
| 90 mph (144.84 km/h) | 95.77 mph (154.13 km/h) |
| 95 mph (152.89 km/h) | 101.09 mph (162.69 km/h) |
| 100 mph (160.93 km/h) | 106.41 mph (171.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1708 | 1984 | 2137 | 2231 | 2333 | 2406 | 2486 | 2580 | 2711 | 2842 | 2987 | 3104 | 3314 | 3547 | 3729 | 3845 | 3910 | 4150 | 4485 | 5212 |
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