Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 255/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 30.05 (763.2) | -0.35 (-9) -1.2% |
| Width inches (mm) | 6.89 (175) | 10.04 (255) | 3.15 (80) 45.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 94.4 (2397.66) | -1.11 (-28.27) -1.2% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 6.02 (153) | -0.18 (-4.5) -2.9% |
| Revolutions per mile (km) | 663.39 (412.21) | 671.21 (417.07) | 7.82 (4.86) 1.2% |
255/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.81 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.76 km/h) |
| 30 mph (48.28 km/h) | 29.65 mph (47.72 km/h) |
| 35 mph (56.33 km/h) | 34.59 mph (55.67 km/h) |
| 40 mph (64.37 km/h) | 39.53 mph (63.62 km/h) |
| 45 mph (72.42 km/h) | 44.48 mph (71.58 km/h) |
| 50 mph (80.47 km/h) | 49.42 mph (79.53 km/h) |
| 55 mph (88.51 km/h) | 54.36 mph (87.48 km/h) |
| 60 mph (96.56 km/h) | 59.3 mph (95.44 km/h) |
| 65 mph (104.61 km/h) | 64.24 mph (103.39 km/h) |
| 70 mph (112.65 km/h) | 69.18 mph (111.34 km/h) |
| 75 mph (120.7 km/h) | 74.13 mph (119.29 km/h) |
| 80 mph (128.75 km/h) | 79.07 mph (127.25 km/h) |
| 85 mph (136.79 km/h) | 84.01 mph (135.2 km/h) |
| 90 mph (144.84 km/h) | 88.95 mph (143.15 km/h) |
| 95 mph (152.89 km/h) | 93.89 mph (151.11 km/h) |
| 100 mph (160.93 km/h) | 98.83 mph (159.06 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
