Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 180/90-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 26.76 (679.6) | 1.42 (36) 5.6% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 79.6 (2021.93) | 84.06 (2135.03) | 4.45 (113.1) 5.6% |
| Sidewall Height inches (mm) | 5.67 (144) | 6.38 (162) | 0.71 (18) 12.5% |
| Revolutions per mile (km) | 795.94 (494.58) | 753.78 (468.38) | -42.16 (-26.2) -5.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.12 mph (33.99 km/h) |
| 25 mph (40.23 km/h) | 26.4 mph (42.48 km/h) |
| 30 mph (48.28 km/h) | 31.68 mph (50.98 km/h) |
| 35 mph (56.33 km/h) | 36.96 mph (59.48 km/h) |
| 40 mph (64.37 km/h) | 42.24 mph (67.97 km/h) |
| 45 mph (72.42 km/h) | 47.52 mph (76.47 km/h) |
| 50 mph (80.47 km/h) | 52.8 mph (84.97 km/h) |
| 55 mph (88.51 km/h) | 58.08 mph (93.47 km/h) |
| 60 mph (96.56 km/h) | 63.36 mph (101.96 km/h) |
| 65 mph (104.61 km/h) | 68.64 mph (110.46 km/h) |
| 70 mph (112.65 km/h) | 73.92 mph (118.96 km/h) |
| 75 mph (120.7 km/h) | 79.2 mph (127.45 km/h) |
| 80 mph (128.75 km/h) | 84.47 mph (135.95 km/h) |
| 85 mph (136.79 km/h) | 89.75 mph (144.45 km/h) |
| 90 mph (144.84 km/h) | 95.03 mph (152.94 km/h) |
| 95 mph (152.89 km/h) | 100.31 mph (161.44 km/h) |
| 100 mph (160.93 km/h) | 105.59 mph (169.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1918 | 2228 | 2400 | 2506 | 2620 | 2702 | 2792 | 2898 | 3045 | 3192 | 3355 | 3485 | 3722 | 3983 | 4187 | 4318 | 4392 | 4661 | 5036 | 5853 |
Better Fuel Economy Factory Ratios Increased Power
