Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-10 | 235/85-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.09 (434) | 27.73 (704.3) | 10.64 (270.3) 62.3% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 53.68 (1363.45) | 87.11 (2212.62) | 33.43 (849.17) 62.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 7.86 (199.75) | 4.32 (109.75) 121.9% |
| Revolutions per mile (km) | 1180.35 (733.43) | 727.35 (451.95) | -453 (-281.48) -38.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 32.46 mph (52.23 km/h) |
| 25 mph (40.23 km/h) | 40.57 mph (65.29 km/h) |
| 30 mph (48.28 km/h) | 48.68 mph (78.35 km/h) |
| 35 mph (56.33 km/h) | 56.8 mph (91.41 km/h) |
| 40 mph (64.37 km/h) | 64.91 mph (104.47 km/h) |
| 45 mph (72.42 km/h) | 73.03 mph (117.52 km/h) |
| 50 mph (80.47 km/h) | 81.14 mph (130.58 km/h) |
| 55 mph (88.51 km/h) | 89.25 mph (143.64 km/h) |
| 60 mph (96.56 km/h) | 97.37 mph (156.7 km/h) |
| 65 mph (104.61 km/h) | 105.48 mph (169.76 km/h) |
| 70 mph (112.65 km/h) | 113.6 mph (182.82 km/h) |
| 75 mph (120.7 km/h) | 121.71 mph (195.87 km/h) |
| 80 mph (128.75 km/h) | 129.82 mph (208.93 km/h) |
| 85 mph (136.79 km/h) | 137.94 mph (221.99 km/h) |
| 90 mph (144.84 km/h) | 146.05 mph (235.05 km/h) |
| 95 mph (152.89 km/h) | 154.17 mph (248.11 km/h) |
| 100 mph (160.93 km/h) | 162.28 mph (261.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1851 | 2150 | 2316 | 2418 | 2528 | 2607 | 2694 | 2796 | 2938 | 3080 | 3237 | 3363 | 3592 | 3844 | 4041 | 4167 | 4238 | 4497 | 4860 | 5647 |
Better Fuel Economy Factory Ratios Increased Power
