Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 170/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 24.37 (619) | -0.55 (-14) -2.2% |
| Width inches (mm) | 7.09 (180) | 6.69 (170) | -0.39 (-10) -5.6% |
| Circum. inches (mm) | 78.29 (1988.63) | 76.56 (1944.65) | -1.73 (-43.98) -2.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.69 (119) | -0.28 (-7) -5.6% |
| Revolutions per mile (km) | 809.27 (502.86) | 827.58 (514.23) | 18.3 (11.37) 2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.56 mph (31.48 km/h) |
| 25 mph (40.23 km/h) | 24.45 mph (39.34 km/h) |
| 30 mph (48.28 km/h) | 29.34 mph (47.21 km/h) |
| 35 mph (56.33 km/h) | 34.23 mph (55.08 km/h) |
| 40 mph (64.37 km/h) | 39.12 mph (62.95 km/h) |
| 45 mph (72.42 km/h) | 44 mph (70.82 km/h) |
| 50 mph (80.47 km/h) | 48.89 mph (78.69 km/h) |
| 55 mph (88.51 km/h) | 53.78 mph (86.56 km/h) |
| 60 mph (96.56 km/h) | 58.67 mph (94.43 km/h) |
| 65 mph (104.61 km/h) | 63.56 mph (102.29 km/h) |
| 70 mph (112.65 km/h) | 68.45 mph (110.16 km/h) |
| 75 mph (120.7 km/h) | 73.34 mph (118.03 km/h) |
| 80 mph (128.75 km/h) | 78.23 mph (125.9 km/h) |
| 85 mph (136.79 km/h) | 83.12 mph (133.77 km/h) |
| 90 mph (144.84 km/h) | 88.01 mph (141.64 km/h) |
| 95 mph (152.89 km/h) | 92.9 mph (149.51 km/h) |
| 100 mph (160.93 km/h) | 97.79 mph (157.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2106 | 2447 | 2635 | 2751 | 2877 | 2966 | 3065 | 3181 | 3343 | 3504 | 3683 | 3827 | 4087 | 4373 | 4597 | 4741 | 4821 | 5117 | 5529 | 6426 |
Better Fuel Economy Factory Ratios Increased Power
