Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/80-17 | 125/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.87 (631.8) | 25.87 (657.2) | 1 (25.4) 4% |
| Width inches (mm) | 4.92 (125) | 4.92 (125) | 0 (0) 0% |
| Circum. inches (mm) | 78.14 (1984.86) | 81.29 (2064.65) | 3.14 (79.8) 4% |
| Sidewall Height inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Revolutions per mile (km) | 810.81 (503.81) | 779.47 (484.34) | -31.34 (-19.47) -3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.8 mph (33.48 km/h) |
| 25 mph (40.23 km/h) | 26.01 mph (41.85 km/h) |
| 30 mph (48.28 km/h) | 31.21 mph (50.22 km/h) |
| 35 mph (56.33 km/h) | 36.41 mph (58.59 km/h) |
| 40 mph (64.37 km/h) | 41.61 mph (66.96 km/h) |
| 45 mph (72.42 km/h) | 46.81 mph (75.33 km/h) |
| 50 mph (80.47 km/h) | 52.01 mph (83.7 km/h) |
| 55 mph (88.51 km/h) | 57.21 mph (92.07 km/h) |
| 60 mph (96.56 km/h) | 62.41 mph (100.44 km/h) |
| 65 mph (104.61 km/h) | 67.61 mph (108.81 km/h) |
| 70 mph (112.65 km/h) | 72.81 mph (117.18 km/h) |
| 75 mph (120.7 km/h) | 78.02 mph (125.55 km/h) |
| 80 mph (128.75 km/h) | 83.22 mph (133.92 km/h) |
| 85 mph (136.79 km/h) | 88.42 mph (142.29 km/h) |
| 90 mph (144.84 km/h) | 93.62 mph (150.66 km/h) |
| 95 mph (152.89 km/h) | 98.82 mph (159.03 km/h) |
| 100 mph (160.93 km/h) | 104.02 mph (167.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 2304 | 2482 | 2591 | 2710 | 2794 | 2887 | 2997 | 3148 | 3300 | 3469 | 3604 | 3849 | 4119 | 4330 | 4465 | 4541 | 4820 | 5208 | 6052 |
Better Fuel Economy Factory Ratios Increased Power
