Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 115/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 25.7 (652.7) | -0.81 (-20.5) -3% |
| Width inches (mm) | 5.31 (135) | 4.53 (115) | -0.79 (-20) -14.8% |
| Circum. inches (mm) | 83.26 (2114.92) | 80.73 (2050.52) | -2.54 (-64.4) -3% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.85 (97.75) | -0.4 (-10.25) -9.5% |
| Revolutions per mile (km) | 760.95 (472.83) | 784.85 (487.68) | 23.9 (14.85) 3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.39 mph (31.21 km/h) |
| 25 mph (40.23 km/h) | 24.24 mph (39.01 km/h) |
| 30 mph (48.28 km/h) | 29.09 mph (46.81 km/h) |
| 35 mph (56.33 km/h) | 33.93 mph (54.61 km/h) |
| 40 mph (64.37 km/h) | 38.78 mph (62.41 km/h) |
| 45 mph (72.42 km/h) | 43.63 mph (70.22 km/h) |
| 50 mph (80.47 km/h) | 48.48 mph (78.02 km/h) |
| 55 mph (88.51 km/h) | 53.33 mph (85.82 km/h) |
| 60 mph (96.56 km/h) | 58.17 mph (93.62 km/h) |
| 65 mph (104.61 km/h) | 63.02 mph (101.42 km/h) |
| 70 mph (112.65 km/h) | 67.87 mph (109.22 km/h) |
| 75 mph (120.7 km/h) | 72.72 mph (117.03 km/h) |
| 80 mph (128.75 km/h) | 77.56 mph (124.83 km/h) |
| 85 mph (136.79 km/h) | 82.41 mph (132.63 km/h) |
| 90 mph (144.84 km/h) | 87.26 mph (140.43 km/h) |
| 95 mph (152.89 km/h) | 92.11 mph (148.23 km/h) |
| 100 mph (160.93 km/h) | 96.95 mph (156.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | 2320 | 2499 | 2609 | 2728 | 2813 | 2907 | 3017 | 3170 | 3323 | 3493 | 3629 | 3876 | 4148 | 4360 | 4496 | 4573 | 4853 | 5244 | 6094 |
Better Fuel Economy Factory Ratios Increased Power
