Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 115/90-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 23.15 (588) | 1.81 (46) 8.5% |
| Width inches (mm) | 4.53 (115) | 4.53 (115) | 0 (0) 0% |
| Circum. inches (mm) | 67.04 (1702.74) | 72.73 (1847.26) | 5.69 (144.51) 8.5% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 4.07 (103.5) | 0.91 (23) 28.6% |
| Revolutions per mile (km) | 945.15 (587.29) | 871.21 (541.34) | -73.94 (-45.94) -7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.7 mph (34.92 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.65 km/h) |
| 30 mph (48.28 km/h) | 32.55 mph (52.38 km/h) |
| 35 mph (56.33 km/h) | 37.97 mph (61.11 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.84 km/h) |
| 45 mph (72.42 km/h) | 48.82 mph (78.57 km/h) |
| 50 mph (80.47 km/h) | 54.24 mph (87.3 km/h) |
| 55 mph (88.51 km/h) | 59.67 mph (96.03 km/h) |
| 60 mph (96.56 km/h) | 65.09 mph (104.76 km/h) |
| 65 mph (104.61 km/h) | 70.52 mph (113.49 km/h) |
| 70 mph (112.65 km/h) | 75.94 mph (122.22 km/h) |
| 75 mph (120.7 km/h) | 81.37 mph (130.95 km/h) |
| 80 mph (128.75 km/h) | 86.79 mph (139.67 km/h) |
| 85 mph (136.79 km/h) | 92.21 mph (148.4 km/h) |
| 90 mph (144.84 km/h) | 97.64 mph (157.13 km/h) |
| 95 mph (152.89 km/h) | 103.06 mph (165.86 km/h) |
| 100 mph (160.93 km/h) | 108.49 mph (174.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2217 | 2576 | 2774 | 2896 | 3028 | 3123 | 3227 | 3349 | 3519 | 3689 | 3877 | 4028 | 4302 | 4604 | 4840 | 4991 | 5076 | 5387 | 5821 | 6764 |
Better Fuel Economy Factory Ratios Increased Power
