Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.44 (570) | 24.47 (621.5) | 2.03 (51.5) 9% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 70.5 (1790.71) | 76.87 (1952.5) | 6.37 (161.79) 9% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 4.73 (120.25) | 1.01 (25.75) 27.2% |
| Revolutions per mile (km) | 898.72 (558.44) | 824.25 (512.16) | -74.47 (-46.27) -8.3% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.81 mph (35.1 km/h) |
| 25 mph (40.23 km/h) | 27.26 mph (43.87 km/h) |
| 30 mph (48.28 km/h) | 32.71 mph (52.64 km/h) |
| 35 mph (56.33 km/h) | 38.16 mph (61.42 km/h) |
| 40 mph (64.37 km/h) | 43.61 mph (70.19 km/h) |
| 45 mph (72.42 km/h) | 49.07 mph (78.96 km/h) |
| 50 mph (80.47 km/h) | 54.52 mph (87.74 km/h) |
| 55 mph (88.51 km/h) | 59.97 mph (96.51 km/h) |
| 60 mph (96.56 km/h) | 65.42 mph (105.29 km/h) |
| 65 mph (104.61 km/h) | 70.87 mph (114.06 km/h) |
| 70 mph (112.65 km/h) | 76.32 mph (122.83 km/h) |
| 75 mph (120.7 km/h) | 81.78 mph (131.61 km/h) |
| 80 mph (128.75 km/h) | 87.23 mph (140.38 km/h) |
| 85 mph (136.79 km/h) | 92.68 mph (149.15 km/h) |
| 90 mph (144.84 km/h) | 98.13 mph (157.93 km/h) |
| 95 mph (152.89 km/h) | 103.58 mph (166.7 km/h) |
| 100 mph (160.93 km/h) | 109.04 mph (175.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2098 | 2437 | 2624 | 2740 | 2865 | 2954 | 3053 | 3169 | 3329 | 3490 | 3668 | 3811 | 4070 | 4356 | 4579 | 4722 | 4802 | 5097 | 5507 | 6400 |
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