Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/75-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.24 (793.5) | 29.99 (761.78) | -1.25 (-31.72) -4% |
| Width inches (mm) | 10.83 (275) | 9.49 (241) | -1.34 (-34) -12.4% |
| Circum. inches (mm) | 98.14 (2492.85) | 94.22 (2393.2) | -3.92 (-99.65) -4% |
| Sidewall Height inches (mm) | 8.12 (206.25) | 7.5 (190.39) | -0.62 (-15.86) -7.7% |
| Revolutions per mile (km) | 645.58 (401.15) | 672.46 (417.85) | 26.88 (16.7) 4.2% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.2 mph (30.9 km/h) |
| 25 mph (40.23 km/h) | 24 mph (38.63 km/h) |
| 30 mph (48.28 km/h) | 28.8 mph (46.35 km/h) |
| 35 mph (56.33 km/h) | 33.6 mph (54.08 km/h) |
| 40 mph (64.37 km/h) | 38.4 mph (61.8 km/h) |
| 45 mph (72.42 km/h) | 43.2 mph (69.53 km/h) |
| 50 mph (80.47 km/h) | 48 mph (77.25 km/h) |
| 55 mph (88.51 km/h) | 52.8 mph (84.98 km/h) |
| 60 mph (96.56 km/h) | 57.6 mph (92.7 km/h) |
| 65 mph (104.61 km/h) | 62.4 mph (100.43 km/h) |
| 70 mph (112.65 km/h) | 67.2 mph (108.15 km/h) |
| 75 mph (120.7 km/h) | 72 mph (115.88 km/h) |
| 80 mph (128.75 km/h) | 76.8 mph (123.6 km/h) |
| 85 mph (136.79 km/h) | 81.6 mph (131.33 km/h) |
| 90 mph (144.84 km/h) | 86.4 mph (139.05 km/h) |
| 95 mph (152.89 km/h) | 91.2 mph (146.78 km/h) |
| 100 mph (160.93 km/h) | 96 mph (154.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1988 | 2141 | 2236 | 2338 | 2410 | 2490 | 2585 | 2716 | 2847 | 2993 | 3109 | 3321 | 3554 | 3736 | 3852 | 3918 | 4158 | 4493 | 5221 |
Better Fuel Economy Factory Ratios Increased Power
