Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/60-18 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.91 (607.2) | 24.47 (621.5) | 0.56 (14.3) 2.4% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 75.1 (1907.58) | 76.87 (1952.5) | 1.77 (44.92) 2.4% |
| Sidewall Height inches (mm) | 2.95 (75) | 4.73 (120.25) | 1.78 (45.25) 60.3% |
| Revolutions per mile (km) | 843.66 (524.22) | 824.25 (512.16) | -19.41 (-12.06) -2.3% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.47 mph (32.94 km/h) |
| 25 mph (40.23 km/h) | 25.59 mph (41.18 km/h) |
| 30 mph (48.28 km/h) | 30.71 mph (49.42 km/h) |
| 35 mph (56.33 km/h) | 35.82 mph (57.65 km/h) |
| 40 mph (64.37 km/h) | 40.94 mph (65.89 km/h) |
| 45 mph (72.42 km/h) | 46.06 mph (74.13 km/h) |
| 50 mph (80.47 km/h) | 51.18 mph (82.36 km/h) |
| 55 mph (88.51 km/h) | 56.3 mph (90.6 km/h) |
| 60 mph (96.56 km/h) | 61.41 mph (98.83 km/h) |
| 65 mph (104.61 km/h) | 66.53 mph (107.07 km/h) |
| 70 mph (112.65 km/h) | 71.65 mph (115.31 km/h) |
| 75 mph (120.7 km/h) | 76.77 mph (123.54 km/h) |
| 80 mph (128.75 km/h) | 81.88 mph (131.78 km/h) |
| 85 mph (136.79 km/h) | 87 mph (140.02 km/h) |
| 90 mph (144.84 km/h) | 92.12 mph (148.25 km/h) |
| 95 mph (152.89 km/h) | 97.24 mph (156.49 km/h) |
| 100 mph (160.93 km/h) | 102.36 mph (164.72 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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