Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 255/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 25.05 (636.3) | 3.41 (86.5) 15.7% |
| Width inches (mm) | 6.89 (175) | 10.04 (255) | 3.15 (80) 45.7% |
| Circum. inches (mm) | 68 (1727.25) | 78.7 (1999) | 10.7 (271.75) 15.7% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 6.53 (165.75) | 1.7 (43.25) 35.3% |
| Revolutions per mile (km) | 931.74 (578.95) | 805.08 (500.25) | -126.66 (-78.7) -13.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.15 mph (37.25 km/h) |
| 25 mph (40.23 km/h) | 28.93 mph (46.56 km/h) |
| 30 mph (48.28 km/h) | 34.72 mph (55.88 km/h) |
| 35 mph (56.33 km/h) | 40.51 mph (65.19 km/h) |
| 40 mph (64.37 km/h) | 46.29 mph (74.5 km/h) |
| 45 mph (72.42 km/h) | 52.08 mph (83.81 km/h) |
| 50 mph (80.47 km/h) | 57.87 mph (93.13 km/h) |
| 55 mph (88.51 km/h) | 63.65 mph (102.44 km/h) |
| 60 mph (96.56 km/h) | 69.44 mph (111.75 km/h) |
| 65 mph (104.61 km/h) | 75.23 mph (121.07 km/h) |
| 70 mph (112.65 km/h) | 81.01 mph (130.38 km/h) |
| 75 mph (120.7 km/h) | 86.8 mph (139.69 km/h) |
| 80 mph (128.75 km/h) | 92.59 mph (149 km/h) |
| 85 mph (136.79 km/h) | 98.37 mph (158.32 km/h) |
| 90 mph (144.84 km/h) | 104.16 mph (167.63 km/h) |
| 95 mph (152.89 km/h) | 109.95 mph (176.94 km/h) |
| 100 mph (160.93 km/h) | 115.73 mph (186.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2049 | 2380 | 2563 | 2676 | 2799 | 2886 | 2982 | 3095 | 3252 | 3409 | 3583 | 3723 | 3975 | 4254 | 4472 | 4612 | 4690 | 4978 | 5379 | 6251 |
Better Fuel Economy Factory Ratios Increased Power
