Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/85-16 | 180/85-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.37 (644.4) | 28.05 (712.4) | 2.68 (68) 10.6% |
| Width inches (mm) | 5.51 (140) | 7.09 (180) | 1.57 (40) 28.6% |
| Circum. inches (mm) | 79.7 (2024.44) | 88.11 (2238.07) | 8.41 (213.63) 10.6% |
| Sidewall Height inches (mm) | 4.69 (119) | 6.02 (153) | 1.34 (34) 28.6% |
| Revolutions per mile (km) | 794.96 (493.96) | 719.08 (446.81) | -75.88 (-47.15) -9.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.11 mph (35.58 km/h) |
| 25 mph (40.23 km/h) | 27.64 mph (44.48 km/h) |
| 30 mph (48.28 km/h) | 33.17 mph (53.38 km/h) |
| 35 mph (56.33 km/h) | 38.69 mph (62.27 km/h) |
| 40 mph (64.37 km/h) | 44.22 mph (71.17 km/h) |
| 45 mph (72.42 km/h) | 49.75 mph (80.06 km/h) |
| 50 mph (80.47 km/h) | 55.28 mph (88.96 km/h) |
| 55 mph (88.51 km/h) | 60.8 mph (97.85 km/h) |
| 60 mph (96.56 km/h) | 66.33 mph (106.75 km/h) |
| 65 mph (104.61 km/h) | 71.86 mph (115.65 km/h) |
| 70 mph (112.65 km/h) | 77.39 mph (124.54 km/h) |
| 75 mph (120.7 km/h) | 82.91 mph (133.44 km/h) |
| 80 mph (128.75 km/h) | 88.44 mph (142.33 km/h) |
| 85 mph (136.79 km/h) | 93.97 mph (151.23 km/h) |
| 90 mph (144.84 km/h) | 99.5 mph (160.13 km/h) |
| 95 mph (152.89 km/h) | 105.02 mph (169.02 km/h) |
| 100 mph (160.93 km/h) | 110.55 mph (177.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1830 | 2126 | 2289 | 2391 | 2500 | 2577 | 2663 | 2764 | 2904 | 3045 | 3200 | 3325 | 3551 | 3800 | 3995 | 4119 | 4189 | 4446 | 4804 | 5583 |
Better Fuel Economy Factory Ratios Increased Power
