Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 165/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 26.09 (662.8) | -0.76 (-19.2) -2.8% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 84.35 (2142.57) | 81.98 (2082.25) | -2.37 (-60.32) -2.8% |
| Sidewall Height inches (mm) | 3.43 (87) | 4.55 (115.5) | 1.12 (28.5) 32.8% |
| Revolutions per mile (km) | 751.13 (466.73) | 772.89 (480.25) | 21.76 (13.52) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.3 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.16 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.74 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.56 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.38 km/h) |
| 50 mph (80.47 km/h) | 48.59 mph (78.2 km/h) |
| 55 mph (88.51 km/h) | 53.45 mph (86.02 km/h) |
| 60 mph (96.56 km/h) | 58.31 mph (93.84 km/h) |
| 65 mph (104.61 km/h) | 63.17 mph (101.66 km/h) |
| 70 mph (112.65 km/h) | 68.03 mph (109.48 km/h) |
| 75 mph (120.7 km/h) | 72.89 mph (117.3 km/h) |
| 80 mph (128.75 km/h) | 77.75 mph (125.12 km/h) |
| 85 mph (136.79 km/h) | 82.61 mph (132.94 km/h) |
| 90 mph (144.84 km/h) | 87.47 mph (140.76 km/h) |
| 95 mph (152.89 km/h) | 92.33 mph (148.58 km/h) |
| 100 mph (160.93 km/h) | 97.18 mph (156.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1967 | 2285 | 2461 | 2569 | 2687 | 2770 | 2862 | 2971 | 3122 | 3273 | 3440 | 3574 | 3817 | 4084 | 4294 | 4428 | 4503 | 4779 | 5164 | 6001 |
Better Fuel Economy Factory Ratios Increased Power
