Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-17.5 | 245/85-17.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31 (787.5) | 33.9 (861) | 2.89 (73.5) 9.3% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 97.4 (2474) | 106.49 (2704.91) | 9.09 (230.91) 9.3% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 8.2 (208.25) | 1.45 (36.75) 21.4% |
| Revolutions per mile (km) | 650.5 (404.2) | 594.97 (369.7) | -55.53 (-34.51) -8.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.87 mph (35.19 km/h) |
| 25 mph (40.23 km/h) | 27.33 mph (43.99 km/h) |
| 30 mph (48.28 km/h) | 32.8 mph (52.79 km/h) |
| 35 mph (56.33 km/h) | 38.27 mph (61.58 km/h) |
| 40 mph (64.37 km/h) | 43.73 mph (70.38 km/h) |
| 45 mph (72.42 km/h) | 49.2 mph (79.18 km/h) |
| 50 mph (80.47 km/h) | 54.67 mph (87.98 km/h) |
| 55 mph (88.51 km/h) | 60.13 mph (96.78 km/h) |
| 60 mph (96.56 km/h) | 65.6 mph (105.57 km/h) |
| 65 mph (104.61 km/h) | 71.07 mph (114.37 km/h) |
| 70 mph (112.65 km/h) | 76.53 mph (123.17 km/h) |
| 75 mph (120.7 km/h) | 82 mph (131.97 km/h) |
| 80 mph (128.75 km/h) | 87.47 mph (140.76 km/h) |
| 85 mph (136.79 km/h) | 92.93 mph (149.56 km/h) |
| 90 mph (144.84 km/h) | 98.4 mph (158.36 km/h) |
| 95 mph (152.89 km/h) | 103.87 mph (167.16 km/h) |
| 100 mph (160.93 km/h) | 109.33 mph (175.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1514 | 1759 | 1894 | 1978 | 2068 | 2133 | 2203 | 2287 | 2403 | 2519 | 2648 | 2751 | 2938 | 3144 | 3305 | 3408 | 3466 | 3679 | 3975 | 4620 |
Better Fuel Economy Factory Ratios Increased Power
