Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-18 | 133/84.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.38 (619.2) | 26.9 (683.3) | 2.52 (64.1) 10.4% |
| Width inches (mm) | 3.54 (90) | 5.24 (133) | 1.69 (43) 47.8% |
| Circum. inches (mm) | 76.59 (1945.27) | 84.51 (2146.65) | 7.93 (201.38) 10.4% |
| Sidewall Height inches (mm) | 3.19 (81) | 4.45 (113.05) | 1.26 (32.05) 39.6% |
| Revolutions per mile (km) | 827.31 (514.07) | 749.7 (465.84) | -77.61 (-48.22) -9.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.07 mph (35.52 km/h) |
| 25 mph (40.23 km/h) | 27.59 mph (44.4 km/h) |
| 30 mph (48.28 km/h) | 33.11 mph (53.28 km/h) |
| 35 mph (56.33 km/h) | 38.62 mph (62.16 km/h) |
| 40 mph (64.37 km/h) | 44.14 mph (71.04 km/h) |
| 45 mph (72.42 km/h) | 49.66 mph (79.92 km/h) |
| 50 mph (80.47 km/h) | 55.18 mph (88.8 km/h) |
| 55 mph (88.51 km/h) | 60.69 mph (97.68 km/h) |
| 60 mph (96.56 km/h) | 66.21 mph (106.56 km/h) |
| 65 mph (104.61 km/h) | 71.73 mph (115.44 km/h) |
| 70 mph (112.65 km/h) | 77.25 mph (124.32 km/h) |
| 75 mph (120.7 km/h) | 82.76 mph (133.2 km/h) |
| 80 mph (128.75 km/h) | 88.28 mph (142.08 km/h) |
| 85 mph (136.79 km/h) | 93.8 mph (150.96 km/h) |
| 90 mph (144.84 km/h) | 99.32 mph (159.84 km/h) |
| 95 mph (152.89 km/h) | 104.83 mph (168.72 km/h) |
| 100 mph (160.93 km/h) | 110.35 mph (177.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1908 | 2216 | 2387 | 2492 | 2606 | 2687 | 2777 | 2882 | 3028 | 3174 | 3337 | 3467 | 3702 | 3962 | 4165 | 4295 | 4368 | 4636 | 5009 | 5821 |
Better Fuel Economy Factory Ratios Increased Power
