Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-15 | 185/70-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.57 (624) | 24.2 (614.6) | -0.37 (-9.4) -1.5% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 77.18 (1960.35) | 76.02 (1930.82) | -1.16 (-29.53) -1.5% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 5.1 (129.5) | 0.31 (8) 6.6% |
| Revolutions per mile (km) | 820.95 (510.11) | 833.5 (517.91) | 12.56 (7.8) 1.5% |
185/70-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.7 mph (31.7 km/h) |
| 25 mph (40.23 km/h) | 24.62 mph (39.63 km/h) |
| 30 mph (48.28 km/h) | 29.55 mph (47.55 km/h) |
| 35 mph (56.33 km/h) | 34.47 mph (55.48 km/h) |
| 40 mph (64.37 km/h) | 39.4 mph (63.4 km/h) |
| 45 mph (72.42 km/h) | 44.32 mph (71.33 km/h) |
| 50 mph (80.47 km/h) | 49.25 mph (79.26 km/h) |
| 55 mph (88.51 km/h) | 54.17 mph (87.18 km/h) |
| 60 mph (96.56 km/h) | 59.1 mph (95.11 km/h) |
| 65 mph (104.61 km/h) | 64.02 mph (103.03 km/h) |
| 70 mph (112.65 km/h) | 68.95 mph (110.96 km/h) |
| 75 mph (120.7 km/h) | 73.87 mph (118.88 km/h) |
| 80 mph (128.75 km/h) | 78.79 mph (126.81 km/h) |
| 85 mph (136.79 km/h) | 83.72 mph (134.73 km/h) |
| 90 mph (144.84 km/h) | 88.64 mph (142.66 km/h) |
| 95 mph (152.89 km/h) | 93.57 mph (150.58 km/h) |
| 100 mph (160.93 km/h) | 98.49 mph (158.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2121 | 2464 | 2654 | 2771 | 2897 | 2988 | 3087 | 3204 | 3367 | 3529 | 3710 | 3854 | 4116 | 4405 | 4630 | 4775 | 4856 | 5154 | 5569 | 6472 |
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