Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 115/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 22.24 (565) | 0.91 (23) 4.2% |
| Width inches (mm) | 4.53 (115) | 4.53 (115) | 0 (0) 0% |
| Circum. inches (mm) | 67.04 (1702.74) | 69.88 (1775) | 2.84 (72.26) 4.2% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 3.62 (92) | 0.45 (11.5) 14.3% |
| Revolutions per mile (km) | 945.15 (587.29) | 906.67 (563.38) | -38.48 (-23.91) -4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.85 mph (33.55 km/h) |
| 25 mph (40.23 km/h) | 26.06 mph (41.94 km/h) |
| 30 mph (48.28 km/h) | 31.27 mph (50.33 km/h) |
| 35 mph (56.33 km/h) | 36.49 mph (58.72 km/h) |
| 40 mph (64.37 km/h) | 41.7 mph (67.11 km/h) |
| 45 mph (72.42 km/h) | 46.91 mph (75.49 km/h) |
| 50 mph (80.47 km/h) | 52.12 mph (83.88 km/h) |
| 55 mph (88.51 km/h) | 57.33 mph (92.27 km/h) |
| 60 mph (96.56 km/h) | 62.55 mph (100.66 km/h) |
| 65 mph (104.61 km/h) | 67.76 mph (109.05 km/h) |
| 70 mph (112.65 km/h) | 72.97 mph (117.43 km/h) |
| 75 mph (120.7 km/h) | 78.18 mph (125.82 km/h) |
| 80 mph (128.75 km/h) | 83.39 mph (134.21 km/h) |
| 85 mph (136.79 km/h) | 88.61 mph (142.6 km/h) |
| 90 mph (144.84 km/h) | 93.82 mph (150.99 km/h) |
| 95 mph (152.89 km/h) | 99.03 mph (159.38 km/h) |
| 100 mph (160.93 km/h) | 104.24 mph (167.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2307 | 2680 | 2887 | 3014 | 3152 | 3250 | 3358 | 3486 | 3662 | 3839 | 4035 | 4192 | 4477 | 4791 | 5037 | 5194 | 5282 | 5606 | 6058 | 7040 |
Better Fuel Economy Factory Ratios Increased Power
