Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/80-15 | 26/8.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.65 (677) | 26.06 (661.8) | -0.6 (-15.2) -2.2% |
| Width inches (mm) | 7.28 (185) | 8.5 (216) | 1.22 (31) 16.8% |
| Circum. inches (mm) | 83.73 (2126.86) | 81.85 (2079.11) | -1.88 (-47.75) -2.2% |
| Sidewall Height inches (mm) | 5.83 (148) | 5.53 (140.4) | -0.3 (-7.6) -5.1% |
| Revolutions per mile (km) | 756.68 (470.18) | 774.06 (480.98) | 17.38 (10.8) 2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.55 mph (31.46 km/h) |
| 25 mph (40.23 km/h) | 24.44 mph (39.33 km/h) |
| 30 mph (48.28 km/h) | 29.33 mph (47.2 km/h) |
| 35 mph (56.33 km/h) | 34.21 mph (55.06 km/h) |
| 40 mph (64.37 km/h) | 39.1 mph (62.93 km/h) |
| 45 mph (72.42 km/h) | 43.99 mph (70.79 km/h) |
| 50 mph (80.47 km/h) | 48.88 mph (78.66 km/h) |
| 55 mph (88.51 km/h) | 53.77 mph (86.53 km/h) |
| 60 mph (96.56 km/h) | 58.65 mph (94.39 km/h) |
| 65 mph (104.61 km/h) | 63.54 mph (102.26 km/h) |
| 70 mph (112.65 km/h) | 68.43 mph (110.12 km/h) |
| 75 mph (120.7 km/h) | 73.32 mph (117.99 km/h) |
| 80 mph (128.75 km/h) | 78.2 mph (125.86 km/h) |
| 85 mph (136.79 km/h) | 83.09 mph (133.72 km/h) |
| 90 mph (144.84 km/h) | 87.98 mph (141.59 km/h) |
| 95 mph (152.89 km/h) | 92.87 mph (149.46 km/h) |
| 100 mph (160.93 km/h) | 97.75 mph (157.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1970 | 2288 | 2464 | 2573 | 2691 | 2775 | 2867 | 2976 | 3127 | 3277 | 3445 | 3579 | 3822 | 4091 | 4300 | 4434 | 4510 | 4786 | 5172 | 6010 |
Better Fuel Economy Factory Ratios Increased Power
