Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-18 | 195/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.47 (697.7) | 31.82 (808.2) | 4.35 (110.5) 15.8% |
| Width inches (mm) | 7.28 (185) | 7.68 (195) | 0.39 (10) 5.4% |
| Circum. inches (mm) | 86.29 (2191.89) | 99.96 (2539.04) | 13.67 (347.15) 15.8% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 6.91 (175.5) | 2.18 (55.25) 45.9% |
| Revolutions per mile (km) | 734.23 (456.23) | 633.84 (393.85) | -100.39 (-62.38) -13.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.17 mph (37.28 km/h) |
| 25 mph (40.23 km/h) | 28.96 mph (46.61 km/h) |
| 30 mph (48.28 km/h) | 34.75 mph (55.93 km/h) |
| 35 mph (56.33 km/h) | 40.54 mph (65.25 km/h) |
| 40 mph (64.37 km/h) | 46.34 mph (74.57 km/h) |
| 45 mph (72.42 km/h) | 52.13 mph (83.89 km/h) |
| 50 mph (80.47 km/h) | 57.92 mph (93.21 km/h) |
| 55 mph (88.51 km/h) | 63.71 mph (102.53 km/h) |
| 60 mph (96.56 km/h) | 69.5 mph (111.85 km/h) |
| 65 mph (104.61 km/h) | 75.29 mph (121.18 km/h) |
| 70 mph (112.65 km/h) | 81.09 mph (130.5 km/h) |
| 75 mph (120.7 km/h) | 86.88 mph (139.82 km/h) |
| 80 mph (128.75 km/h) | 92.67 mph (149.14 km/h) |
| 85 mph (136.79 km/h) | 98.46 mph (158.46 km/h) |
| 90 mph (144.84 km/h) | 104.25 mph (167.78 km/h) |
| 95 mph (152.89 km/h) | 110.05 mph (177.1 km/h) |
| 100 mph (160.93 km/h) | 115.84 mph (186.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1613 | 1874 | 2018 | 2107 | 2203 | 2272 | 2347 | 2437 | 2560 | 2684 | 2821 | 2931 | 3130 | 3350 | 3521 | 3631 | 3693 | 3919 | 4235 | 4921 |
Better Fuel Economy Factory Ratios Increased Power
