Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-15 | 120/90-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.61 (549) | 22.5 (571.6) | 0.89 (22.6) 4.1% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 67.9 (1724.73) | 70.7 (1795.73) | 2.8 (71) 4.1% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.25 (108) | 0.94 (24) 28.6% |
| Revolutions per mile (km) | 933.1 (579.8) | 896.2 (556.87) | -36.89 (-22.92) -4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.82 mph (33.51 km/h) |
| 25 mph (40.23 km/h) | 26.03 mph (41.89 km/h) |
| 30 mph (48.28 km/h) | 31.23 mph (50.27 km/h) |
| 35 mph (56.33 km/h) | 36.44 mph (58.65 km/h) |
| 40 mph (64.37 km/h) | 41.65 mph (67.02 km/h) |
| 45 mph (72.42 km/h) | 46.85 mph (75.4 km/h) |
| 50 mph (80.47 km/h) | 52.06 mph (83.78 km/h) |
| 55 mph (88.51 km/h) | 57.26 mph (92.16 km/h) |
| 60 mph (96.56 km/h) | 62.47 mph (100.54 km/h) |
| 65 mph (104.61 km/h) | 67.68 mph (108.91 km/h) |
| 70 mph (112.65 km/h) | 72.88 mph (117.29 km/h) |
| 75 mph (120.7 km/h) | 78.09 mph (125.67 km/h) |
| 80 mph (128.75 km/h) | 83.29 mph (134.05 km/h) |
| 85 mph (136.79 km/h) | 88.5 mph (142.43 km/h) |
| 90 mph (144.84 km/h) | 93.7 mph (150.8 km/h) |
| 95 mph (152.89 km/h) | 98.91 mph (159.18 km/h) |
| 100 mph (160.93 km/h) | 104.12 mph (167.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2281 | 2649 | 2853 | 2979 | 3115 | 3212 | 3319 | 3445 | 3620 | 3795 | 3989 | 4144 | 4425 | 4736 | 4979 | 5134 | 5221 | 5542 | 5988 | 6958 |
Better Fuel Economy Factory Ratios Increased Power
