Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 25/7.5-15 | 185/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (636.94) | 24.47 (621.5) | -0.61 (-15.44) -2.4% |
| Width inches (mm) | 7.52 (191) | 7.28 (185) | -0.24 (-6) -3.1% |
| Circum. inches (mm) | 78.78 (2001.01) | 76.87 (1952.5) | -1.91 (-48.51) -2.4% |
| Sidewall Height inches (mm) | 5.04 (127.97) | 4.73 (120.25) | -0.3 (-7.72) -6% |
| Revolutions per mile (km) | 804.27 (499.75) | 824.25 (512.16) | 19.98 (12.42) 2.5% |
185/65-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.52 mph (31.41 km/h) |
| 25 mph (40.23 km/h) | 24.39 mph (39.26 km/h) |
| 30 mph (48.28 km/h) | 29.27 mph (47.11 km/h) |
| 35 mph (56.33 km/h) | 34.15 mph (54.96 km/h) |
| 40 mph (64.37 km/h) | 39.03 mph (62.81 km/h) |
| 45 mph (72.42 km/h) | 43.91 mph (70.67 km/h) |
| 50 mph (80.47 km/h) | 48.79 mph (78.52 km/h) |
| 55 mph (88.51 km/h) | 53.67 mph (86.37 km/h) |
| 60 mph (96.56 km/h) | 58.55 mph (94.22 km/h) |
| 65 mph (104.61 km/h) | 63.42 mph (102.07 km/h) |
| 70 mph (112.65 km/h) | 68.3 mph (109.92 km/h) |
| 75 mph (120.7 km/h) | 73.18 mph (117.78 km/h) |
| 80 mph (128.75 km/h) | 78.06 mph (125.63 km/h) |
| 85 mph (136.79 km/h) | 82.94 mph (133.48 km/h) |
| 90 mph (144.84 km/h) | 87.82 mph (141.33 km/h) |
| 95 mph (152.89 km/h) | 92.7 mph (149.18 km/h) |
| 100 mph (160.93 km/h) | 97.58 mph (157.03 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 |
Better Fuel Economy Factory Ratios Increased Power
