Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-17 | 255/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.71 (830.8) | 31.06 (788.8) | -1.65 (-42) -5.1% |
| Width inches (mm) | 11.22 (285) | 10.04 (255) | -1.18 (-30) -10.5% |
| Circum. inches (mm) | 102.76 (2610.04) | 97.56 (2478.09) | -5.19 (-131.95) -5.1% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.03 (178.5) | -0.83 (-21) -10.5% |
| Revolutions per mile (km) | 616.6 (383.14) | 649.43 (403.54) | 32.83 (20.4) 5.3% |
255/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.99 mph (30.56 km/h) |
| 25 mph (40.23 km/h) | 23.74 mph (38.2 km/h) |
| 30 mph (48.28 km/h) | 28.48 mph (45.84 km/h) |
| 35 mph (56.33 km/h) | 33.23 mph (53.48 km/h) |
| 40 mph (64.37 km/h) | 37.98 mph (61.12 km/h) |
| 45 mph (72.42 km/h) | 42.73 mph (68.76 km/h) |
| 50 mph (80.47 km/h) | 47.47 mph (76.4 km/h) |
| 55 mph (88.51 km/h) | 52.22 mph (84.04 km/h) |
| 60 mph (96.56 km/h) | 56.97 mph (91.68 km/h) |
| 65 mph (104.61 km/h) | 61.71 mph (99.32 km/h) |
| 70 mph (112.65 km/h) | 66.46 mph (106.96 km/h) |
| 75 mph (120.7 km/h) | 71.21 mph (114.6 km/h) |
| 80 mph (128.75 km/h) | 75.96 mph (122.24 km/h) |
| 85 mph (136.79 km/h) | 80.7 mph (129.88 km/h) |
| 90 mph (144.84 km/h) | 85.45 mph (137.52 km/h) |
| 95 mph (152.89 km/h) | 90.2 mph (145.16 km/h) |
| 100 mph (160.93 km/h) | 94.94 mph (152.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1920 | 2068 | 2159 | 2257 | 2328 | 2405 | 2497 | 2623 | 2750 | 2890 | 3003 | 3207 | 3432 | 3608 | 3720 | 3784 | 4016 | 4339 | 5042 |
Better Fuel Economy Factory Ratios Increased Power
