Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-13 | 185/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.85 (504.2) | 23.2 (589.2) | 3.35 (85) 16.9% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 62.36 (1583.99) | 72.88 (1851.03) | 10.51 (267.04) 16.9% |
| Sidewall Height inches (mm) | 3.43 (87) | 5.1 (129.5) | 1.67 (42.5) 48.9% |
| Revolutions per mile (km) | 1016.01 (631.32) | 869.43 (540.24) | -146.57 (-91.08) -14.4% |
185/70-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.37 mph (37.61 km/h) |
| 25 mph (40.23 km/h) | 29.21 mph (47.02 km/h) |
| 30 mph (48.28 km/h) | 35.06 mph (56.42 km/h) |
| 35 mph (56.33 km/h) | 40.9 mph (65.82 km/h) |
| 40 mph (64.37 km/h) | 46.74 mph (75.23 km/h) |
| 45 mph (72.42 km/h) | 52.59 mph (84.63 km/h) |
| 50 mph (80.47 km/h) | 58.43 mph (94.03 km/h) |
| 55 mph (88.51 km/h) | 64.27 mph (103.44 km/h) |
| 60 mph (96.56 km/h) | 70.12 mph (112.84 km/h) |
| 65 mph (104.61 km/h) | 75.96 mph (122.24 km/h) |
| 70 mph (112.65 km/h) | 81.8 mph (131.65 km/h) |
| 75 mph (120.7 km/h) | 87.64 mph (141.05 km/h) |
| 80 mph (128.75 km/h) | 93.49 mph (150.45 km/h) |
| 85 mph (136.79 km/h) | 99.33 mph (159.86 km/h) |
| 90 mph (144.84 km/h) | 105.17 mph (169.26 km/h) |
| 95 mph (152.89 km/h) | 111.02 mph (178.66 km/h) |
| 100 mph (160.93 km/h) | 116.86 mph (188.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2213 | 2570 | 2768 | 2890 | 3022 | 3116 | 3220 | 3342 | 3512 | 3681 | 3870 | 4020 | 4293 | 4595 | 4830 | 4981 | 5065 | 5376 | 5809 | 6751 |
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