Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-18 | 130/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 26.19 (665.2) | -0.31 (-8) -1.2% |
| Width inches (mm) | 4.72 (120) | 5.12 (130) | 0.39 (10) 8.3% |
| Circum. inches (mm) | 83.26 (2114.92) | 82.28 (2089.79) | -0.99 (-25.13) -1.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.09 (104) | -0.16 (-4) -3.7% |
| Revolutions per mile (km) | 760.95 (472.83) | 770.1 (478.52) | 9.15 (5.69) 1.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.76 mph (31.8 km/h) |
| 25 mph (40.23 km/h) | 24.7 mph (39.76 km/h) |
| 30 mph (48.28 km/h) | 29.64 mph (47.71 km/h) |
| 35 mph (56.33 km/h) | 34.58 mph (55.66 km/h) |
| 40 mph (64.37 km/h) | 39.52 mph (63.61 km/h) |
| 45 mph (72.42 km/h) | 44.47 mph (71.56 km/h) |
| 50 mph (80.47 km/h) | 49.41 mph (79.51 km/h) |
| 55 mph (88.51 km/h) | 54.35 mph (87.46 km/h) |
| 60 mph (96.56 km/h) | 59.29 mph (95.41 km/h) |
| 65 mph (104.61 km/h) | 64.23 mph (103.36 km/h) |
| 70 mph (112.65 km/h) | 69.17 mph (111.32 km/h) |
| 75 mph (120.7 km/h) | 74.11 mph (119.27 km/h) |
| 80 mph (128.75 km/h) | 79.05 mph (127.22 km/h) |
| 85 mph (136.79 km/h) | 83.99 mph (135.17 km/h) |
| 90 mph (144.84 km/h) | 88.93 mph (143.12 km/h) |
| 95 mph (152.89 km/h) | 93.87 mph (151.07 km/h) |
| 100 mph (160.93 km/h) | 98.81 mph (159.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1960 | 2277 | 2452 | 2560 | 2677 | 2760 | 2852 | 2960 | 3111 | 3261 | 3427 | 3561 | 3803 | 4070 | 4278 | 4412 | 4487 | 4762 | 5145 | 5979 |
Better Fuel Economy Factory Ratios Increased Power
