Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 175/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 31.71 (805.5) | 2.62 (66.5) 9% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 91.4 (2321.64) | 99.63 (2530.55) | 8.23 (208.92) 9% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 5.86 (148.75) | 1.31 (33.25) 28.8% |
| Revolutions per mile (km) | 693.19 (430.73) | 635.97 (395.17) | -57.23 (-35.56) -8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.85 km/h) |
| 30 mph (48.28 km/h) | 32.7 mph (52.62 km/h) |
| 35 mph (56.33 km/h) | 38.15 mph (61.4 km/h) |
| 40 mph (64.37 km/h) | 43.6 mph (70.17 km/h) |
| 45 mph (72.42 km/h) | 49.05 mph (78.94 km/h) |
| 50 mph (80.47 km/h) | 54.5 mph (87.71 km/h) |
| 55 mph (88.51 km/h) | 59.95 mph (96.48 km/h) |
| 60 mph (96.56 km/h) | 65.4 mph (105.25 km/h) |
| 65 mph (104.61 km/h) | 70.85 mph (114.02 km/h) |
| 70 mph (112.65 km/h) | 76.3 mph (122.79 km/h) |
| 75 mph (120.7 km/h) | 81.75 mph (131.56 km/h) |
| 80 mph (128.75 km/h) | 87.2 mph (140.33 km/h) |
| 85 mph (136.79 km/h) | 92.65 mph (149.1 km/h) |
| 90 mph (144.84 km/h) | 98.1 mph (157.87 km/h) |
| 95 mph (152.89 km/h) | 103.55 mph (166.65 km/h) |
| 100 mph (160.93 km/h) | 109 mph (175.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1618 | 1880 | 2025 | 2114 | 2211 | 2280 | 2355 | 2445 | 2569 | 2693 | 2830 | 2941 | 3140 | 3361 | 3533 | 3643 | 3705 | 3932 | 4249 | 4938 |
Better Fuel Economy Factory Ratios Increased Power
