Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-16 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.57 (649.4) | 26.68 (677.7) | 1.11 (28.3) 4.4% |
| Width inches (mm) | 5.31 (135) | 9.65 (245) | 4.33 (110) 81.5% |
| Circum. inches (mm) | 80.32 (2040.15) | 83.82 (2129.06) | 3.5 (88.91) 4.4% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 4.34 (110.25) | -0.44 (-11.25) -9.3% |
| Revolutions per mile (km) | 788.84 (490.16) | 755.9 (469.69) | -32.94 (-20.47) -4.2% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.87 mph (33.59 km/h) |
| 25 mph (40.23 km/h) | 26.09 mph (41.99 km/h) |
| 30 mph (48.28 km/h) | 31.31 mph (50.38 km/h) |
| 35 mph (56.33 km/h) | 36.53 mph (58.78 km/h) |
| 40 mph (64.37 km/h) | 41.74 mph (67.18 km/h) |
| 45 mph (72.42 km/h) | 46.96 mph (75.58 km/h) |
| 50 mph (80.47 km/h) | 52.18 mph (83.97 km/h) |
| 55 mph (88.51 km/h) | 57.4 mph (92.37 km/h) |
| 60 mph (96.56 km/h) | 62.61 mph (100.77 km/h) |
| 65 mph (104.61 km/h) | 67.83 mph (109.17 km/h) |
| 70 mph (112.65 km/h) | 73.05 mph (117.56 km/h) |
| 75 mph (120.7 km/h) | 78.27 mph (125.96 km/h) |
| 80 mph (128.75 km/h) | 83.49 mph (134.36 km/h) |
| 85 mph (136.79 km/h) | 88.7 mph (142.76 km/h) |
| 90 mph (144.84 km/h) | 93.92 mph (151.15 km/h) |
| 95 mph (152.89 km/h) | 99.14 mph (159.55 km/h) |
| 100 mph (160.93 km/h) | 104.36 mph (167.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1924 | 2235 | 2407 | 2513 | 2628 | 2709 | 2799 | 2906 | 3053 | 3201 | 3364 | 3495 | 3733 | 3995 | 4199 | 4330 | 4404 | 4674 | 5050 | 5869 |
Better Fuel Economy Factory Ratios Increased Power
