Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/85-16 | 125/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.37 (618.9) | 25.87 (657.2) | 1.51 (38.3) 6.2% |
| Width inches (mm) | 4.92 (125) | 4.92 (125) | 0 (0) 0% |
| Circum. inches (mm) | 76.55 (1944.33) | 81.29 (2064.65) | 4.74 (120.32) 6.2% |
| Sidewall Height inches (mm) | 4.18 (106.25) | 3.94 (100) | -0.25 (-6.25) -5.9% |
| Revolutions per mile (km) | 827.71 (514.31) | 779.47 (484.34) | -48.24 (-29.97) -5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.24 mph (34.18 km/h) |
| 25 mph (40.23 km/h) | 26.55 mph (42.72 km/h) |
| 30 mph (48.28 km/h) | 31.86 mph (51.27 km/h) |
| 35 mph (56.33 km/h) | 37.17 mph (59.81 km/h) |
| 40 mph (64.37 km/h) | 42.48 mph (68.36 km/h) |
| 45 mph (72.42 km/h) | 47.78 mph (76.9 km/h) |
| 50 mph (80.47 km/h) | 53.09 mph (85.45 km/h) |
| 55 mph (88.51 km/h) | 58.4 mph (93.99 km/h) |
| 60 mph (96.56 km/h) | 63.71 mph (102.54 km/h) |
| 65 mph (104.61 km/h) | 69.02 mph (111.08 km/h) |
| 70 mph (112.65 km/h) | 74.33 mph (119.63 km/h) |
| 75 mph (120.7 km/h) | 79.64 mph (128.17 km/h) |
| 80 mph (128.75 km/h) | 84.95 mph (136.72 km/h) |
| 85 mph (136.79 km/h) | 90.26 mph (145.26 km/h) |
| 90 mph (144.84 km/h) | 95.57 mph (153.8 km/h) |
| 95 mph (152.89 km/h) | 100.88 mph (162.35 km/h) |
| 100 mph (160.93 km/h) | 106.19 mph (170.89 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
