Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-18 | 225/90-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.44 (646.2) | 30.94 (786) | 5.5 (139.8) 21.6% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 79.93 (2030.1) | 97.22 (2469.29) | 17.29 (439.19) 21.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 7.97 (202.5) | 4.25 (108) 114.3% |
| Revolutions per mile (km) | 792.74 (492.59) | 651.74 (404.97) | -141 (-87.61) -17.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.33 mph (39.15 km/h) |
| 25 mph (40.23 km/h) | 30.41 mph (48.94 km/h) |
| 30 mph (48.28 km/h) | 36.49 mph (58.73 km/h) |
| 35 mph (56.33 km/h) | 42.57 mph (68.51 km/h) |
| 40 mph (64.37 km/h) | 48.65 mph (78.3 km/h) |
| 45 mph (72.42 km/h) | 54.74 mph (88.09 km/h) |
| 50 mph (80.47 km/h) | 60.82 mph (97.88 km/h) |
| 55 mph (88.51 km/h) | 66.9 mph (107.66 km/h) |
| 60 mph (96.56 km/h) | 72.98 mph (117.45 km/h) |
| 65 mph (104.61 km/h) | 79.06 mph (127.24 km/h) |
| 70 mph (112.65 km/h) | 85.14 mph (137.03 km/h) |
| 75 mph (120.7 km/h) | 91.23 mph (146.81 km/h) |
| 80 mph (128.75 km/h) | 97.31 mph (156.6 km/h) |
| 85 mph (136.79 km/h) | 103.39 mph (166.39 km/h) |
| 90 mph (144.84 km/h) | 109.47 mph (176.18 km/h) |
| 95 mph (152.89 km/h) | 115.55 mph (185.96 km/h) |
| 100 mph (160.93 km/h) | 121.63 mph (195.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1659 | 1927 | 2075 | 2167 | 2266 | 2336 | 2414 | 2505 | 2633 | 2760 | 2901 | 3014 | 3218 | 3444 | 3621 | 3734 | 3797 | 4030 | 4355 | 5060 |
Better Fuel Economy Factory Ratios Increased Power
