Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-18 | 120/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 24.56 (623.8) | -0.53 (-13.4) -2.1% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 78.81 (2001.82) | 77.15 (1959.73) | -1.66 (-42.1) -2.1% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.78 (96) | 0.24 (6) 6.7% |
| Revolutions per mile (km) | 803.94 (499.54) | 821.21 (510.27) | 17.27 (10.73) 2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.58 mph (31.51 km/h) |
| 25 mph (40.23 km/h) | 24.47 mph (39.39 km/h) |
| 30 mph (48.28 km/h) | 29.37 mph (47.27 km/h) |
| 35 mph (56.33 km/h) | 34.26 mph (55.14 km/h) |
| 40 mph (64.37 km/h) | 39.16 mph (63.02 km/h) |
| 45 mph (72.42 km/h) | 44.05 mph (70.9 km/h) |
| 50 mph (80.47 km/h) | 48.95 mph (78.78 km/h) |
| 55 mph (88.51 km/h) | 53.84 mph (86.65 km/h) |
| 60 mph (96.56 km/h) | 58.74 mph (94.53 km/h) |
| 65 mph (104.61 km/h) | 63.63 mph (102.41 km/h) |
| 70 mph (112.65 km/h) | 68.53 mph (110.29 km/h) |
| 75 mph (120.7 km/h) | 73.42 mph (118.16 km/h) |
| 80 mph (128.75 km/h) | 78.32 mph (126.04 km/h) |
| 85 mph (136.79 km/h) | 83.21 mph (133.92 km/h) |
| 90 mph (144.84 km/h) | 88.11 mph (141.8 km/h) |
| 95 mph (152.89 km/h) | 93 mph (149.67 km/h) |
| 100 mph (160.93 km/h) | 97.9 mph (157.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2090 | 2428 | 2614 | 2730 | 2855 | 2944 | 3041 | 3157 | 3317 | 3477 | 3655 | 3797 | 4055 | 4340 | 4562 | 4704 | 4784 | 5078 | 5487 | 6376 |
Better Fuel Economy Factory Ratios Increased Power
