Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-19 | 145/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.13 (714.6) | 27.7 (703.7) | -0.43 (-10.9) -1.5% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 88.39 (2244.98) | 87.04 (2210.74) | -1.35 (-34.24) -1.5% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.85 (123.25) | 0.29 (7.25) 6.3% |
| Revolutions per mile (km) | 716.86 (445.44) | 727.97 (452.34) | 11.1 (6.9) 1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.7 km/h) |
| 25 mph (40.23 km/h) | 24.62 mph (39.62 km/h) |
| 30 mph (48.28 km/h) | 29.54 mph (47.54 km/h) |
| 35 mph (56.33 km/h) | 34.47 mph (55.47 km/h) |
| 40 mph (64.37 km/h) | 39.39 mph (63.39 km/h) |
| 45 mph (72.42 km/h) | 44.31 mph (71.32 km/h) |
| 50 mph (80.47 km/h) | 49.24 mph (79.24 km/h) |
| 55 mph (88.51 km/h) | 54.16 mph (87.16 km/h) |
| 60 mph (96.56 km/h) | 59.08 mph (95.09 km/h) |
| 65 mph (104.61 km/h) | 64.01 mph (103.01 km/h) |
| 70 mph (112.65 km/h) | 68.93 mph (110.94 km/h) |
| 75 mph (120.7 km/h) | 73.86 mph (118.86 km/h) |
| 80 mph (128.75 km/h) | 78.78 mph (126.78 km/h) |
| 85 mph (136.79 km/h) | 83.7 mph (134.71 km/h) |
| 90 mph (144.84 km/h) | 88.63 mph (142.63 km/h) |
| 95 mph (152.89 km/h) | 93.55 mph (150.56 km/h) |
| 100 mph (160.93 km/h) | 98.47 mph (158.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1853 | 2152 | 2318 | 2420 | 2530 | 2609 | 2696 | 2799 | 2940 | 3082 | 3240 | 3366 | 3595 | 3847 | 4044 | 4170 | 4241 | 4501 | 4864 | 5652 |
Better Fuel Economy Factory Ratios Increased Power
