Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-14 | 255/45-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.09 (535.6) | 23.04 (585.1) | 1.95 (49.5) 9.2% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 66.25 (1682.64) | 72.37 (1838.15) | 6.12 (155.51) 9.2% |
| Sidewall Height inches (mm) | 3.54 (90) | 4.52 (114.75) | 0.97 (24.75) 27.5% |
| Revolutions per mile (km) | 956.44 (594.3) | 875.53 (544.03) | -80.92 (-50.28) -8.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.85 mph (35.16 km/h) |
| 25 mph (40.23 km/h) | 27.31 mph (43.95 km/h) |
| 30 mph (48.28 km/h) | 32.77 mph (52.74 km/h) |
| 35 mph (56.33 km/h) | 38.23 mph (61.53 km/h) |
| 40 mph (64.37 km/h) | 43.7 mph (70.32 km/h) |
| 45 mph (72.42 km/h) | 49.16 mph (79.11 km/h) |
| 50 mph (80.47 km/h) | 54.62 mph (87.9 km/h) |
| 55 mph (88.51 km/h) | 60.08 mph (96.69 km/h) |
| 60 mph (96.56 km/h) | 65.55 mph (105.48 km/h) |
| 65 mph (104.61 km/h) | 71.01 mph (114.28 km/h) |
| 70 mph (112.65 km/h) | 76.47 mph (123.07 km/h) |
| 75 mph (120.7 km/h) | 81.93 mph (131.86 km/h) |
| 80 mph (128.75 km/h) | 87.39 mph (140.65 km/h) |
| 85 mph (136.79 km/h) | 92.86 mph (149.44 km/h) |
| 90 mph (144.84 km/h) | 98.32 mph (158.23 km/h) |
| 95 mph (152.89 km/h) | 103.78 mph (167.02 km/h) |
| 100 mph (160.93 km/h) | 109.24 mph (175.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2228 | 2588 | 2787 | 2911 | 3043 | 3138 | 3243 | 3366 | 3536 | 3707 | 3897 | 4048 | 4323 | 4627 | 4864 | 5015 | 5101 | 5414 | 5850 | 6798 |
Better Fuel Economy Factory Ratios Increased Power
