Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 255/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 26.06 (661.8) | 4.41 (112) 20.4% |
| Width inches (mm) | 6.89 (175) | 10.04 (255) | 3.15 (80) 45.7% |
| Circum. inches (mm) | 68 (1727.25) | 81.85 (2079.11) | 13.85 (351.86) 20.4% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 7.03 (178.5) | 2.2 (56) 45.7% |
| Revolutions per mile (km) | 931.74 (578.95) | 774.06 (480.98) | -157.68 (-97.98) -16.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.07 mph (38.74 km/h) |
| 25 mph (40.23 km/h) | 30.09 mph (48.43 km/h) |
| 30 mph (48.28 km/h) | 36.11 mph (58.12 km/h) |
| 35 mph (56.33 km/h) | 42.13 mph (67.8 km/h) |
| 40 mph (64.37 km/h) | 48.15 mph (77.49 km/h) |
| 45 mph (72.42 km/h) | 54.17 mph (87.17 km/h) |
| 50 mph (80.47 km/h) | 60.19 mph (96.86 km/h) |
| 55 mph (88.51 km/h) | 66.2 mph (106.55 km/h) |
| 60 mph (96.56 km/h) | 72.22 mph (116.23 km/h) |
| 65 mph (104.61 km/h) | 78.24 mph (125.92 km/h) |
| 70 mph (112.65 km/h) | 84.26 mph (135.6 km/h) |
| 75 mph (120.7 km/h) | 90.28 mph (145.29 km/h) |
| 80 mph (128.75 km/h) | 96.3 mph (154.98 km/h) |
| 85 mph (136.79 km/h) | 102.32 mph (164.66 km/h) |
| 90 mph (144.84 km/h) | 108.33 mph (174.35 km/h) |
| 95 mph (152.89 km/h) | 114.35 mph (184.03 km/h) |
| 100 mph (160.93 km/h) | 120.37 mph (193.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1970 | 2288 | 2464 | 2573 | 2691 | 2775 | 2867 | 2976 | 3127 | 3277 | 3445 | 3579 | 3822 | 4091 | 4300 | 4434 | 4510 | 4786 | 5172 | 6010 |
Better Fuel Economy Factory Ratios Increased Power
