Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-14 | 255/40-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.09 (535.6) | 22.03 (559.6) | 0.94 (24) 4.5% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 66.25 (1682.64) | 69.21 (1758.04) | 2.97 (75.4) 4.5% |
| Sidewall Height inches (mm) | 3.54 (90) | 4.02 (102) | 0.47 (12) 13.3% |
| Revolutions per mile (km) | 956.44 (594.3) | 915.42 (568.82) | -41.02 (-25.49) -4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.9 mph (33.63 km/h) |
| 25 mph (40.23 km/h) | 26.12 mph (42.04 km/h) |
| 30 mph (48.28 km/h) | 31.34 mph (50.44 km/h) |
| 35 mph (56.33 km/h) | 36.57 mph (58.85 km/h) |
| 40 mph (64.37 km/h) | 41.79 mph (67.26 km/h) |
| 45 mph (72.42 km/h) | 47.02 mph (75.67 km/h) |
| 50 mph (80.47 km/h) | 52.24 mph (84.07 km/h) |
| 55 mph (88.51 km/h) | 57.46 mph (92.48 km/h) |
| 60 mph (96.56 km/h) | 62.69 mph (100.89 km/h) |
| 65 mph (104.61 km/h) | 67.91 mph (109.29 km/h) |
| 70 mph (112.65 km/h) | 73.14 mph (117.7 km/h) |
| 75 mph (120.7 km/h) | 78.36 mph (126.11 km/h) |
| 80 mph (128.75 km/h) | 83.58 mph (134.52 km/h) |
| 85 mph (136.79 km/h) | 88.81 mph (142.92 km/h) |
| 90 mph (144.84 km/h) | 94.03 mph (151.33 km/h) |
| 95 mph (152.89 km/h) | 99.26 mph (159.74 km/h) |
| 100 mph (160.93 km/h) | 104.48 mph (168.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2330 | 2706 | 2914 | 3043 | 3182 | 3281 | 3390 | 3519 | 3698 | 3876 | 4074 | 4233 | 4520 | 4838 | 5085 | 5244 | 5333 | 5660 | 6116 | 7108 |
Better Fuel Economy Factory Ratios Increased Power
