Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.89 (556) | 24.47 (621.5) | 2.58 (65.5) 11.8% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 68.77 (1746.73) | 76.87 (1952.5) | 8.1 (205.77) 11.8% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 4.73 (120.25) | 1.29 (32.75) 37.4% |
| Revolutions per mile (km) | 921.35 (572.5) | 824.25 (512.16) | -97.1 (-60.34) -10.5% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.36 mph (35.98 km/h) |
| 25 mph (40.23 km/h) | 27.95 mph (44.97 km/h) |
| 30 mph (48.28 km/h) | 33.53 mph (53.97 km/h) |
| 35 mph (56.33 km/h) | 39.12 mph (62.96 km/h) |
| 40 mph (64.37 km/h) | 44.71 mph (71.96 km/h) |
| 45 mph (72.42 km/h) | 50.3 mph (80.95 km/h) |
| 50 mph (80.47 km/h) | 55.89 mph (89.95 km/h) |
| 55 mph (88.51 km/h) | 61.48 mph (98.94 km/h) |
| 60 mph (96.56 km/h) | 67.07 mph (107.94 km/h) |
| 65 mph (104.61 km/h) | 72.66 mph (116.93 km/h) |
| 70 mph (112.65 km/h) | 78.25 mph (125.93 km/h) |
| 75 mph (120.7 km/h) | 83.84 mph (134.92 km/h) |
| 80 mph (128.75 km/h) | 89.42 mph (143.91 km/h) |
| 85 mph (136.79 km/h) | 95.01 mph (152.91 km/h) |
| 90 mph (144.84 km/h) | 100.6 mph (161.9 km/h) |
| 95 mph (152.89 km/h) | 106.19 mph (170.9 km/h) |
| 100 mph (160.93 km/h) | 111.78 mph (179.89 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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