Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.13 (536.8) | 0.63 (16) 3.1% |
| Width inches (mm) | 5.31 (135) | 5.71 (145) | 0.39 (10) 7.4% |
| Circum. inches (mm) | 64.42 (1636.14) | 66.39 (1686.41) | 1.98 (50.27) 3.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.57 (116) | 0.31 (8) 7.4% |
| Revolutions per mile (km) | 983.62 (611.19) | 954.3 (592.98) | -29.32 (-18.22) -3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.61 mph (33.18 km/h) |
| 25 mph (40.23 km/h) | 25.77 mph (41.47 km/h) |
| 30 mph (48.28 km/h) | 30.92 mph (49.76 km/h) |
| 35 mph (56.33 km/h) | 36.08 mph (58.06 km/h) |
| 40 mph (64.37 km/h) | 41.23 mph (66.35 km/h) |
| 45 mph (72.42 km/h) | 46.38 mph (74.65 km/h) |
| 50 mph (80.47 km/h) | 51.54 mph (82.94 km/h) |
| 55 mph (88.51 km/h) | 56.69 mph (91.23 km/h) |
| 60 mph (96.56 km/h) | 61.84 mph (99.53 km/h) |
| 65 mph (104.61 km/h) | 67 mph (107.82 km/h) |
| 70 mph (112.65 km/h) | 72.15 mph (116.12 km/h) |
| 75 mph (120.7 km/h) | 77.3 mph (124.41 km/h) |
| 80 mph (128.75 km/h) | 82.46 mph (132.7 km/h) |
| 85 mph (136.79 km/h) | 87.61 mph (141 km/h) |
| 90 mph (144.84 km/h) | 92.76 mph (149.29 km/h) |
| 95 mph (152.89 km/h) | 97.92 mph (157.58 km/h) |
| 100 mph (160.93 km/h) | 103.07 mph (165.88 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
