Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/75-13 | 185/85-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.93 (607.7) | 25.38 (644.7) | 1.46 (37) 6.1% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 75.16 (1909.15) | 79.74 (2025.38) | 4.58 (116.24) 6.1% |
| Sidewall Height inches (mm) | 5.46 (138.75) | 6.19 (157.25) | 0.73 (18.5) 13.3% |
| Revolutions per mile (km) | 842.97 (523.79) | 794.59 (493.73) | -48.38 (-30.06) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.22 mph (34.15 km/h) |
| 25 mph (40.23 km/h) | 26.52 mph (42.68 km/h) |
| 30 mph (48.28 km/h) | 31.83 mph (51.22 km/h) |
| 35 mph (56.33 km/h) | 37.13 mph (59.76 km/h) |
| 40 mph (64.37 km/h) | 42.44 mph (68.29 km/h) |
| 45 mph (72.42 km/h) | 47.74 mph (76.83 km/h) |
| 50 mph (80.47 km/h) | 53.04 mph (85.37 km/h) |
| 55 mph (88.51 km/h) | 58.35 mph (93.9 km/h) |
| 60 mph (96.56 km/h) | 63.65 mph (102.44 km/h) |
| 65 mph (104.61 km/h) | 68.96 mph (110.98 km/h) |
| 70 mph (112.65 km/h) | 74.26 mph (119.51 km/h) |
| 75 mph (120.7 km/h) | 79.57 mph (128.05 km/h) |
| 80 mph (128.75 km/h) | 84.87 mph (136.59 km/h) |
| 85 mph (136.79 km/h) | 90.18 mph (145.12 km/h) |
| 90 mph (144.84 km/h) | 95.48 mph (153.66 km/h) |
| 95 mph (152.89 km/h) | 100.78 mph (162.2 km/h) |
| 100 mph (160.93 km/h) | 106.09 mph (170.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 2349 | 2530 | 2642 | 2762 | 2848 | 2943 | 3055 | 3210 | 3364 | 3536 | 3674 | 3924 | 4199 | 4414 | 4552 | 4629 | 4913 | 5309 | 6169 |
Better Fuel Economy Factory Ratios Increased Power
