Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 30/8.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 29.97 (761.16) | 2.89 (73.44) 10.7% |
| Width inches (mm) | 8.5 (216) | 8.5 (216) | 0 (0) 0% |
| Circum. inches (mm) | 85.06 (2160.54) | 94.14 (2391.25) | 9.08 (230.72) 10.7% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 7.48 (190.08) | 1.45 (36.72) 23.9% |
| Revolutions per mile (km) | 744.88 (462.85) | 673.01 (418.19) | -71.87 (-44.66) -9.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.62 km/h) |
| 25 mph (40.23 km/h) | 27.67 mph (44.53 km/h) |
| 30 mph (48.28 km/h) | 33.2 mph (53.44 km/h) |
| 35 mph (56.33 km/h) | 38.74 mph (62.34 km/h) |
| 40 mph (64.37 km/h) | 44.27 mph (71.25 km/h) |
| 45 mph (72.42 km/h) | 49.81 mph (80.15 km/h) |
| 50 mph (80.47 km/h) | 55.34 mph (89.06 km/h) |
| 55 mph (88.51 km/h) | 60.87 mph (97.97 km/h) |
| 60 mph (96.56 km/h) | 66.41 mph (106.87 km/h) |
| 65 mph (104.61 km/h) | 71.94 mph (115.78 km/h) |
| 70 mph (112.65 km/h) | 77.48 mph (124.68 km/h) |
| 75 mph (120.7 km/h) | 83.01 mph (133.59 km/h) |
| 80 mph (128.75 km/h) | 88.54 mph (142.5 km/h) |
| 85 mph (136.79 km/h) | 94.08 mph (151.4 km/h) |
| 90 mph (144.84 km/h) | 99.61 mph (160.31 km/h) |
| 95 mph (152.89 km/h) | 105.14 mph (169.21 km/h) |
| 100 mph (160.93 km/h) | 110.68 mph (178.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1713 | 1990 | 2143 | 2237 | 2339 | 2412 | 2493 | 2587 | 2718 | 2850 | 2995 | 3112 | 3323 | 3557 | 3739 | 3855 | 3921 | 4161 | 4497 | 5226 |
Better Fuel Economy Factory Ratios Increased Power
