Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 160/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 28.08 (713.2) | 0.37 (9.5) 1.4% |
| Width inches (mm) | 5.71 (145) | 6.3 (160) | 0.59 (15) 10.3% |
| Circum. inches (mm) | 87.04 (2210.74) | 88.21 (2240.58) | 1.18 (29.85) 1.4% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 5.04 (128) | 0.19 (4.75) 3.9% |
| Revolutions per mile (km) | 727.97 (452.34) | 718.27 (446.31) | -9.7 (-6.03) -1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.62 km/h) |
| 25 mph (40.23 km/h) | 25.34 mph (40.78 km/h) |
| 30 mph (48.28 km/h) | 30.41 mph (48.93 km/h) |
| 35 mph (56.33 km/h) | 35.47 mph (57.09 km/h) |
| 40 mph (64.37 km/h) | 40.54 mph (65.24 km/h) |
| 45 mph (72.42 km/h) | 45.61 mph (73.4 km/h) |
| 50 mph (80.47 km/h) | 50.68 mph (81.55 km/h) |
| 55 mph (88.51 km/h) | 55.74 mph (89.71 km/h) |
| 60 mph (96.56 km/h) | 60.81 mph (97.86 km/h) |
| 65 mph (104.61 km/h) | 65.88 mph (106.02 km/h) |
| 70 mph (112.65 km/h) | 70.95 mph (114.18 km/h) |
| 75 mph (120.7 km/h) | 76.01 mph (122.33 km/h) |
| 80 mph (128.75 km/h) | 81.08 mph (130.49 km/h) |
| 85 mph (136.79 km/h) | 86.15 mph (138.64 km/h) |
| 90 mph (144.84 km/h) | 91.22 mph (146.8 km/h) |
| 95 mph (152.89 km/h) | 96.28 mph (154.95 km/h) |
| 100 mph (160.93 km/h) | 101.35 mph (163.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1828 | 2123 | 2287 | 2388 | 2497 | 2575 | 2660 | 2761 | 2901 | 3041 | 3197 | 3321 | 3547 | 3796 | 3990 | 4115 | 4185 | 4441 | 4799 | 5577 |
Better Fuel Economy Factory Ratios Increased Power
