Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/65-18 | 255/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.54 (775.7) | 30.05 (763.2) | -0.49 (-12.5) -1.6% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 95.94 (2436.93) | 94.4 (2397.66) | -1.55 (-39.27) -1.6% |
| Sidewall Height inches (mm) | 6.27 (159.25) | 6.02 (153) | -0.25 (-6.25) -3.9% |
| Revolutions per mile (km) | 660.4 (410.35) | 671.21 (417.07) | 10.82 (6.72) 1.6% |
255/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.68 mph (31.67 km/h) |
| 25 mph (40.23 km/h) | 24.6 mph (39.59 km/h) |
| 30 mph (48.28 km/h) | 29.52 mph (47.5 km/h) |
| 35 mph (56.33 km/h) | 34.44 mph (55.42 km/h) |
| 40 mph (64.37 km/h) | 39.36 mph (63.34 km/h) |
| 45 mph (72.42 km/h) | 44.27 mph (71.25 km/h) |
| 50 mph (80.47 km/h) | 49.19 mph (79.17 km/h) |
| 55 mph (88.51 km/h) | 54.11 mph (87.09 km/h) |
| 60 mph (96.56 km/h) | 59.03 mph (95 km/h) |
| 65 mph (104.61 km/h) | 63.95 mph (102.92 km/h) |
| 70 mph (112.65 km/h) | 68.87 mph (110.84 km/h) |
| 75 mph (120.7 km/h) | 73.79 mph (118.76 km/h) |
| 80 mph (128.75 km/h) | 78.71 mph (126.67 km/h) |
| 85 mph (136.79 km/h) | 83.63 mph (134.59 km/h) |
| 90 mph (144.84 km/h) | 88.55 mph (142.51 km/h) |
| 95 mph (152.89 km/h) | 93.47 mph (150.42 km/h) |
| 100 mph (160.93 km/h) | 98.39 mph (158.34 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 |
Better Fuel Economy Factory Ratios Increased Power
