Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-15 | 280/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.89 (556) | 32.33 (821.2) | 10.44 (265.2) 47.7% |
| Width inches (mm) | 4.92 (125) | 11.02 (280) | 6.1 (155) 124% |
| Circum. inches (mm) | 68.77 (1746.73) | 101.57 (2579.88) | 32.8 (833.15) 47.7% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 7.17 (182) | 3.72 (94.5) 108% |
| Revolutions per mile (km) | 921.35 (572.5) | 623.81 (387.61) | -297.54 (-184.88) -32.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.54 mph (47.54 km/h) |
| 25 mph (40.23 km/h) | 36.92 mph (59.42 km/h) |
| 30 mph (48.28 km/h) | 44.31 mph (71.31 km/h) |
| 35 mph (56.33 km/h) | 51.69 mph (83.19 km/h) |
| 40 mph (64.37 km/h) | 59.08 mph (95.08 km/h) |
| 45 mph (72.42 km/h) | 66.46 mph (106.96 km/h) |
| 50 mph (80.47 km/h) | 73.85 mph (118.85 km/h) |
| 55 mph (88.51 km/h) | 81.23 mph (130.73 km/h) |
| 60 mph (96.56 km/h) | 88.62 mph (142.62 km/h) |
| 65 mph (104.61 km/h) | 96 mph (154.5 km/h) |
| 70 mph (112.65 km/h) | 103.39 mph (166.39 km/h) |
| 75 mph (120.7 km/h) | 110.77 mph (178.27 km/h) |
| 80 mph (128.75 km/h) | 118.16 mph (190.16 km/h) |
| 85 mph (136.79 km/h) | 125.54 mph (202.04 km/h) |
| 90 mph (144.84 km/h) | 132.93 mph (213.93 km/h) |
| 95 mph (152.89 km/h) | 140.31 mph (225.81 km/h) |
| 100 mph (160.93 km/h) | 147.7 mph (237.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1587 | 1844 | 1986 | 2074 | 2168 | 2236 | 2310 | 2398 | 2520 | 2641 | 2776 | 2884 | 3080 | 3297 | 3465 | 3573 | 3634 | 3857 | 4168 | 4843 |
Better Fuel Economy Factory Ratios Increased Power
