Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-12 | 120/90-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.61 (472.8) | 20.5 (520.8) | 1.89 (48) 10.2% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 58.48 (1485.35) | 64.42 (1636.14) | 5.94 (150.8) 10.2% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.25 (108) | 0.94 (24) 28.6% |
| Revolutions per mile (km) | 1083.48 (673.24) | 983.62 (611.19) | -99.86 (-62.05) -9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.03 mph (35.45 km/h) |
| 25 mph (40.23 km/h) | 27.54 mph (44.32 km/h) |
| 30 mph (48.28 km/h) | 33.05 mph (53.18 km/h) |
| 35 mph (56.33 km/h) | 38.55 mph (62.05 km/h) |
| 40 mph (64.37 km/h) | 44.06 mph (70.91 km/h) |
| 45 mph (72.42 km/h) | 49.57 mph (79.77 km/h) |
| 50 mph (80.47 km/h) | 55.08 mph (88.64 km/h) |
| 55 mph (88.51 km/h) | 60.58 mph (97.5 km/h) |
| 60 mph (96.56 km/h) | 66.09 mph (106.36 km/h) |
| 65 mph (104.61 km/h) | 71.6 mph (115.23 km/h) |
| 70 mph (112.65 km/h) | 77.11 mph (124.09 km/h) |
| 75 mph (120.7 km/h) | 82.61 mph (132.95 km/h) |
| 80 mph (128.75 km/h) | 88.12 mph (141.82 km/h) |
| 85 mph (136.79 km/h) | 93.63 mph (150.68 km/h) |
| 90 mph (144.84 km/h) | 99.14 mph (159.55 km/h) |
| 95 mph (152.89 km/h) | 104.64 mph (168.41 km/h) |
| 100 mph (160.93 km/h) | 110.15 mph (177.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
