Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 245/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 27.65 (702.2) | 1.14 (29) 4.3% |
| Width inches (mm) | 5.31 (135) | 9.65 (245) | 4.33 (110) 81.5% |
| Circum. inches (mm) | 83.26 (2114.92) | 86.85 (2206.03) | 3.59 (91.11) 4.3% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.82 (122.5) | 0.57 (14.5) 13.4% |
| Revolutions per mile (km) | 760.95 (472.83) | 729.52 (453.3) | -31.43 (-19.53) -4.1% |
245/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.86 mph (33.57 km/h) |
| 25 mph (40.23 km/h) | 26.08 mph (41.97 km/h) |
| 30 mph (48.28 km/h) | 31.29 mph (50.36 km/h) |
| 35 mph (56.33 km/h) | 36.51 mph (58.75 km/h) |
| 40 mph (64.37 km/h) | 41.72 mph (67.15 km/h) |
| 45 mph (72.42 km/h) | 46.94 mph (75.54 km/h) |
| 50 mph (80.47 km/h) | 52.15 mph (83.93 km/h) |
| 55 mph (88.51 km/h) | 57.37 mph (92.33 km/h) |
| 60 mph (96.56 km/h) | 62.58 mph (100.72 km/h) |
| 65 mph (104.61 km/h) | 67.8 mph (109.11 km/h) |
| 70 mph (112.65 km/h) | 73.02 mph (117.51 km/h) |
| 75 mph (120.7 km/h) | 78.23 mph (125.9 km/h) |
| 80 mph (128.75 km/h) | 83.45 mph (134.29 km/h) |
| 85 mph (136.79 km/h) | 88.66 mph (142.69 km/h) |
| 90 mph (144.84 km/h) | 93.88 mph (151.08 km/h) |
| 95 mph (152.89 km/h) | 99.09 mph (159.47 km/h) |
| 100 mph (160.93 km/h) | 104.31 mph (167.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1856 | 2157 | 2323 | 2425 | 2536 | 2615 | 2702 | 2804 | 2947 | 3089 | 3247 | 3373 | 3602 | 3855 | 4053 | 4179 | 4250 | 4511 | 4874 | 5664 |
Better Fuel Economy Factory Ratios Increased Power
