Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/45-21 | 245/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.39 (771.9) | 29.57 (751.2) | -0.81 (-20.7) -2.7% |
| Width inches (mm) | 10.43 (265) | 9.65 (245) | -0.79 (-20) -7.5% |
| Circum. inches (mm) | 95.47 (2425) | 92.91 (2359.96) | -2.56 (-65.03) -2.7% |
| Sidewall Height inches (mm) | 4.69 (119.25) | 5.79 (147) | 1.09 (27.75) 23.3% |
| Revolutions per mile (km) | 663.65 (412.37) | 681.94 (423.73) | 18.29 (11.36) 2.8% |
245/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.32 km/h) |
| 25 mph (40.23 km/h) | 24.33 mph (39.15 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (46.99 km/h) |
| 35 mph (56.33 km/h) | 34.06 mph (54.82 km/h) |
| 40 mph (64.37 km/h) | 38.93 mph (62.65 km/h) |
| 45 mph (72.42 km/h) | 43.79 mph (70.48 km/h) |
| 50 mph (80.47 km/h) | 48.66 mph (78.31 km/h) |
| 55 mph (88.51 km/h) | 53.53 mph (86.14 km/h) |
| 60 mph (96.56 km/h) | 58.39 mph (93.97 km/h) |
| 65 mph (104.61 km/h) | 63.26 mph (101.8 km/h) |
| 70 mph (112.65 km/h) | 68.12 mph (109.63 km/h) |
| 75 mph (120.7 km/h) | 72.99 mph (117.46 km/h) |
| 80 mph (128.75 km/h) | 77.85 mph (125.3 km/h) |
| 85 mph (136.79 km/h) | 82.72 mph (133.13 km/h) |
| 90 mph (144.84 km/h) | 87.59 mph (140.96 km/h) |
| 95 mph (152.89 km/h) | 92.45 mph (148.79 km/h) |
| 100 mph (160.93 km/h) | 97.32 mph (156.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1735 | 2016 | 2171 | 2267 | 2370 | 2444 | 2526 | 2622 | 2754 | 2887 | 3035 | 3153 | 3367 | 3604 | 3788 | 3906 | 3973 | 4217 | 4556 | 5295 |
Better Fuel Economy Factory Ratios Increased Power
