Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-18 | 100/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.38 (619.2) | 25.87 (657.2) | 1.5 (38) 6.1% |
| Width inches (mm) | 3.54 (90) | 3.94 (100) | 0.39 (10) 11.1% |
| Circum. inches (mm) | 76.59 (1945.27) | 81.29 (2064.65) | 4.7 (119.38) 6.1% |
| Sidewall Height inches (mm) | 3.19 (81) | 3.94 (100) | 0.75 (19) 23.5% |
| Revolutions per mile (km) | 827.31 (514.07) | 779.47 (484.34) | -47.84 (-29.72) -5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.23 mph (34.16 km/h) |
| 25 mph (40.23 km/h) | 26.53 mph (42.7 km/h) |
| 30 mph (48.28 km/h) | 31.84 mph (51.24 km/h) |
| 35 mph (56.33 km/h) | 37.15 mph (59.78 km/h) |
| 40 mph (64.37 km/h) | 42.45 mph (68.32 km/h) |
| 45 mph (72.42 km/h) | 47.76 mph (76.87 km/h) |
| 50 mph (80.47 km/h) | 53.07 mph (85.41 km/h) |
| 55 mph (88.51 km/h) | 58.38 mph (93.95 km/h) |
| 60 mph (96.56 km/h) | 63.68 mph (102.49 km/h) |
| 65 mph (104.61 km/h) | 68.99 mph (111.03 km/h) |
| 70 mph (112.65 km/h) | 74.3 mph (119.57 km/h) |
| 75 mph (120.7 km/h) | 79.6 mph (128.11 km/h) |
| 80 mph (128.75 km/h) | 84.91 mph (136.65 km/h) |
| 85 mph (136.79 km/h) | 90.22 mph (145.19 km/h) |
| 90 mph (144.84 km/h) | 95.52 mph (153.73 km/h) |
| 95 mph (152.89 km/h) | 100.83 mph (162.27 km/h) |
| 100 mph (160.93 km/h) | 106.14 mph (170.81 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
