Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 25/7.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 25.07 (636.74) | -0.96 (-24.46) -3.7% |
| Width inches (mm) | 4.72 (120) | 7.52 (191) | 2.8 (71) 59.2% |
| Circum. inches (mm) | 81.78 (2077.22) | 78.76 (2000.38) | -3.03 (-76.84) -3.7% |
| Sidewall Height inches (mm) | 4.02 (102) | 3.53 (89.77) | -0.48 (-12.23) -12% |
| Revolutions per mile (km) | 774.76 (481.41) | 804.52 (499.9) | 29.76 (18.49) 3.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.26 mph (31 km/h) |
| 25 mph (40.23 km/h) | 24.08 mph (38.75 km/h) |
| 30 mph (48.28 km/h) | 28.89 mph (46.49 km/h) |
| 35 mph (56.33 km/h) | 33.71 mph (54.24 km/h) |
| 40 mph (64.37 km/h) | 38.52 mph (61.99 km/h) |
| 45 mph (72.42 km/h) | 43.34 mph (69.74 km/h) |
| 50 mph (80.47 km/h) | 48.15 mph (77.49 km/h) |
| 55 mph (88.51 km/h) | 52.97 mph (85.24 km/h) |
| 60 mph (96.56 km/h) | 57.78 mph (92.99 km/h) |
| 65 mph (104.61 km/h) | 62.6 mph (100.74 km/h) |
| 70 mph (112.65 km/h) | 67.41 mph (108.49 km/h) |
| 75 mph (120.7 km/h) | 72.23 mph (116.24 km/h) |
| 80 mph (128.75 km/h) | 77.04 mph (123.98 km/h) |
| 85 mph (136.79 km/h) | 81.86 mph (131.73 km/h) |
| 90 mph (144.84 km/h) | 86.67 mph (139.48 km/h) |
| 95 mph (152.89 km/h) | 91.49 mph (147.23 km/h) |
| 100 mph (160.93 km/h) | 96.3 mph (154.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2047 | 2378 | 2561 | 2675 | 2797 | 2884 | 2980 | 3093 | 3250 | 3406 | 3581 | 3720 | 3973 | 4252 | 4469 | 4609 | 4687 | 4975 | 5375 | 6247 |
Better Fuel Economy Factory Ratios Increased Power
