Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.76 (552.8) | 1.26 (32) 6.1% |
| Width inches (mm) | 5.31 (135) | 6.1 (155) | 0.79 (20) 14.8% |
| Circum. inches (mm) | 64.42 (1636.14) | 68.37 (1736.67) | 3.96 (100.53) 6.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.88 (124) | 0.63 (16) 14.8% |
| Revolutions per mile (km) | 983.62 (611.19) | 926.68 (575.81) | -56.94 (-35.38) -5.8% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.23 mph (34.16 km/h) |
| 25 mph (40.23 km/h) | 26.54 mph (42.71 km/h) |
| 30 mph (48.28 km/h) | 31.84 mph (51.25 km/h) |
| 35 mph (56.33 km/h) | 37.15 mph (59.79 km/h) |
| 40 mph (64.37 km/h) | 42.46 mph (68.33 km/h) |
| 45 mph (72.42 km/h) | 47.76 mph (76.87 km/h) |
| 50 mph (80.47 km/h) | 53.07 mph (85.41 km/h) |
| 55 mph (88.51 km/h) | 58.38 mph (93.95 km/h) |
| 60 mph (96.56 km/h) | 63.69 mph (102.49 km/h) |
| 65 mph (104.61 km/h) | 68.99 mph (111.04 km/h) |
| 70 mph (112.65 km/h) | 74.3 mph (119.58 km/h) |
| 75 mph (120.7 km/h) | 79.61 mph (128.12 km/h) |
| 80 mph (128.75 km/h) | 84.92 mph (136.66 km/h) |
| 85 mph (136.79 km/h) | 90.22 mph (145.2 km/h) |
| 90 mph (144.84 km/h) | 95.53 mph (153.74 km/h) |
| 95 mph (152.89 km/h) | 100.84 mph (162.28 km/h) |
| 100 mph (160.93 km/h) | 106.14 mph (170.82 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
