Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-16 | 125/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.89 (581.4) | 25.87 (657.2) | 2.98 (75.8) 13% |
| Width inches (mm) | 4.92 (125) | 4.92 (125) | 0 (0) 0% |
| Circum. inches (mm) | 71.91 (1826.52) | 81.29 (2064.65) | 9.38 (238.13) 13% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 3.94 (100) | 0.49 (12.5) 14.3% |
| Revolutions per mile (km) | 881.1 (547.49) | 779.47 (484.34) | -101.62 (-63.15) -11.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.61 mph (36.38 km/h) |
| 25 mph (40.23 km/h) | 28.26 mph (45.48 km/h) |
| 30 mph (48.28 km/h) | 33.91 mph (54.57 km/h) |
| 35 mph (56.33 km/h) | 39.56 mph (63.67 km/h) |
| 40 mph (64.37 km/h) | 45.21 mph (72.77 km/h) |
| 45 mph (72.42 km/h) | 50.87 mph (81.86 km/h) |
| 50 mph (80.47 km/h) | 56.52 mph (90.96 km/h) |
| 55 mph (88.51 km/h) | 62.17 mph (100.05 km/h) |
| 60 mph (96.56 km/h) | 67.82 mph (109.15 km/h) |
| 65 mph (104.61 km/h) | 73.47 mph (118.25 km/h) |
| 70 mph (112.65 km/h) | 79.13 mph (127.34 km/h) |
| 75 mph (120.7 km/h) | 84.78 mph (136.44 km/h) |
| 80 mph (128.75 km/h) | 90.43 mph (145.53 km/h) |
| 85 mph (136.79 km/h) | 96.08 mph (154.63 km/h) |
| 90 mph (144.84 km/h) | 101.73 mph (163.72 km/h) |
| 95 mph (152.89 km/h) | 107.39 mph (172.82 km/h) |
| 100 mph (160.93 km/h) | 113.04 mph (181.92 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
