Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 25/8-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 24.95 (633.66) | -0.39 (-9.94) -1.5% |
| Width inches (mm) | 7.09 (180) | 7.99 (203) | 0.91 (23) 12.8% |
| Circum. inches (mm) | 79.6 (2021.93) | 78.37 (1990.7) | -1.23 (-31.23) -1.5% |
| Sidewall Height inches (mm) | 5.67 (144) | 6.47 (164.43) | 0.8 (20.43) 14.2% |
| Revolutions per mile (km) | 795.94 (494.58) | 808.43 (502.33) | 12.49 (7.76) 1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.69 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.61 km/h) |
| 30 mph (48.28 km/h) | 29.54 mph (47.53 km/h) |
| 35 mph (56.33 km/h) | 34.46 mph (55.46 km/h) |
| 40 mph (64.37 km/h) | 39.38 mph (63.38 km/h) |
| 45 mph (72.42 km/h) | 44.31 mph (71.3 km/h) |
| 50 mph (80.47 km/h) | 49.23 mph (79.22 km/h) |
| 55 mph (88.51 km/h) | 54.15 mph (87.15 km/h) |
| 60 mph (96.56 km/h) | 59.07 mph (95.07 km/h) |
| 65 mph (104.61 km/h) | 64 mph (102.99 km/h) |
| 70 mph (112.65 km/h) | 68.92 mph (110.91 km/h) |
| 75 mph (120.7 km/h) | 73.84 mph (118.84 km/h) |
| 80 mph (128.75 km/h) | 78.76 mph (126.76 km/h) |
| 85 mph (136.79 km/h) | 83.69 mph (134.68 km/h) |
| 90 mph (144.84 km/h) | 88.61 mph (142.6 km/h) |
| 95 mph (152.89 km/h) | 93.53 mph (150.53 km/h) |
| 100 mph (160.93 km/h) | 98.46 mph (158.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2057 | 2390 | 2574 | 2688 | 2810 | 2898 | 2994 | 3108 | 3265 | 3423 | 3598 | 3738 | 3992 | 4272 | 4491 | 4631 | 4710 | 4999 | 5402 | 6277 |
Better Fuel Economy Factory Ratios Increased Power
