Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 115/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 22.7 (576.5) | 1.36 (34.5) 6.4% |
| Width inches (mm) | 4.53 (115) | 4.53 (115) | 0 (0) 0% |
| Circum. inches (mm) | 67.04 (1702.74) | 71.3 (1811.13) | 4.27 (108.38) 6.4% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 3.85 (97.75) | 0.68 (17.25) 21.4% |
| Revolutions per mile (km) | 945.15 (587.29) | 888.59 (552.14) | -56.56 (-35.15) -6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.27 mph (34.24 km/h) |
| 25 mph (40.23 km/h) | 26.59 mph (42.79 km/h) |
| 30 mph (48.28 km/h) | 31.91 mph (51.35 km/h) |
| 35 mph (56.33 km/h) | 37.23 mph (59.91 km/h) |
| 40 mph (64.37 km/h) | 42.55 mph (68.47 km/h) |
| 45 mph (72.42 km/h) | 47.86 mph (77.03 km/h) |
| 50 mph (80.47 km/h) | 53.18 mph (85.59 km/h) |
| 55 mph (88.51 km/h) | 58.5 mph (94.15 km/h) |
| 60 mph (96.56 km/h) | 63.82 mph (102.71 km/h) |
| 65 mph (104.61 km/h) | 69.14 mph (111.27 km/h) |
| 70 mph (112.65 km/h) | 74.46 mph (119.83 km/h) |
| 75 mph (120.7 km/h) | 79.77 mph (128.38 km/h) |
| 80 mph (128.75 km/h) | 85.09 mph (136.94 km/h) |
| 85 mph (136.79 km/h) | 90.41 mph (145.5 km/h) |
| 90 mph (144.84 km/h) | 95.73 mph (154.06 km/h) |
| 95 mph (152.89 km/h) | 101.05 mph (162.62 km/h) |
| 100 mph (160.93 km/h) | 106.37 mph (171.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2261 | 2627 | 2829 | 2954 | 3089 | 3185 | 3291 | 3416 | 3589 | 3762 | 3955 | 4109 | 4388 | 4696 | 4936 | 5090 | 5177 | 5494 | 5937 | 6899 |
Better Fuel Economy Factory Ratios Increased Power
