Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/65-18 | 235/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.05 (788.7) | 30.95 (786.2) | -0.1 (-2.5) -0.3% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 97.55 (2477.77) | 97.24 (2469.92) | -0.31 (-7.85) -0.3% |
| Sidewall Height inches (mm) | 6.53 (165.75) | 6.48 (164.5) | -0.05 (-1.25) -0.8% |
| Revolutions per mile (km) | 649.51 (403.59) | 651.58 (404.87) | 2.07 (1.28) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.94 mph (32.08 km/h) |
| 25 mph (40.23 km/h) | 24.92 mph (40.11 km/h) |
| 30 mph (48.28 km/h) | 29.9 mph (48.13 km/h) |
| 35 mph (56.33 km/h) | 34.89 mph (56.15 km/h) |
| 40 mph (64.37 km/h) | 39.87 mph (64.17 km/h) |
| 45 mph (72.42 km/h) | 44.86 mph (72.19 km/h) |
| 50 mph (80.47 km/h) | 49.84 mph (80.21 km/h) |
| 55 mph (88.51 km/h) | 54.83 mph (88.23 km/h) |
| 60 mph (96.56 km/h) | 59.81 mph (96.25 km/h) |
| 65 mph (104.61 km/h) | 64.79 mph (104.28 km/h) |
| 70 mph (112.65 km/h) | 69.78 mph (112.3 km/h) |
| 75 mph (120.7 km/h) | 74.76 mph (120.32 km/h) |
| 80 mph (128.75 km/h) | 79.75 mph (128.34 km/h) |
| 85 mph (136.79 km/h) | 84.73 mph (136.36 km/h) |
| 90 mph (144.84 km/h) | 89.71 mph (144.38 km/h) |
| 95 mph (152.89 km/h) | 94.7 mph (152.4 km/h) |
| 100 mph (160.93 km/h) | 99.68 mph (160.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1658 | 1926 | 2074 | 2166 | 2265 | 2336 | 2413 | 2505 | 2632 | 2759 | 2900 | 3013 | 3217 | 3443 | 3620 | 3733 | 3796 | 4029 | 4353 | 5059 |
Better Fuel Economy Factory Ratios Increased Power
