Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 235/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 32.8 (833.2) | 3.29 (83.5) 11.1% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 92.73 (2355.25) | 103.05 (2617.57) | 10.33 (262.32) 11.1% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.4 (188) | 1.64 (41.75) 28.5% |
| Revolutions per mile (km) | 683.3 (424.58) | 614.82 (382.03) | -68.48 (-42.55) -10% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.23 mph (35.77 km/h) |
| 25 mph (40.23 km/h) | 27.78 mph (44.71 km/h) |
| 30 mph (48.28 km/h) | 33.34 mph (53.66 km/h) |
| 35 mph (56.33 km/h) | 38.9 mph (62.6 km/h) |
| 40 mph (64.37 km/h) | 44.46 mph (71.54 km/h) |
| 45 mph (72.42 km/h) | 50.01 mph (80.49 km/h) |
| 50 mph (80.47 km/h) | 55.57 mph (89.43 km/h) |
| 55 mph (88.51 km/h) | 61.13 mph (98.37 km/h) |
| 60 mph (96.56 km/h) | 66.68 mph (107.32 km/h) |
| 65 mph (104.61 km/h) | 72.24 mph (116.26 km/h) |
| 70 mph (112.65 km/h) | 77.8 mph (125.2 km/h) |
| 75 mph (120.7 km/h) | 83.35 mph (134.14 km/h) |
| 80 mph (128.75 km/h) | 88.91 mph (143.09 km/h) |
| 85 mph (136.79 km/h) | 94.47 mph (152.03 km/h) |
| 90 mph (144.84 km/h) | 100.02 mph (160.97 km/h) |
| 95 mph (152.89 km/h) | 105.58 mph (169.92 km/h) |
| 100 mph (160.93 km/h) | 111.14 mph (178.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1565 | 1818 | 1957 | 2044 | 2137 | 2204 | 2277 | 2364 | 2483 | 2603 | 2736 | 2843 | 3036 | 3249 | 3416 | 3522 | 3582 | 3802 | 4108 | 4774 |
Better Fuel Economy Factory Ratios Increased Power
