Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 30/9.5-15 | 235/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.99 (761.78) | 29.95 (760.8) | -0.04 (-0.98) -0.1% |
| Width inches (mm) | 9.49 (241) | 9.25 (235) | -0.24 (-6) -2.5% |
| Circum. inches (mm) | 94.22 (2393.2) | 94.1 (2390.12) | -0.12 (-3.08) -0.1% |
| Sidewall Height inches (mm) | 7.5 (190.39) | 6.48 (164.5) | -1.02 (-25.89) -13.6% |
| Revolutions per mile (km) | 672.46 (417.85) | 673.33 (418.39) | 0.87 (0.54) 0.1% |
235/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.15 km/h) |
| 25 mph (40.23 km/h) | 24.97 mph (40.18 km/h) |
| 30 mph (48.28 km/h) | 29.96 mph (48.22 km/h) |
| 35 mph (56.33 km/h) | 34.95 mph (56.25 km/h) |
| 40 mph (64.37 km/h) | 39.95 mph (64.29 km/h) |
| 45 mph (72.42 km/h) | 44.94 mph (72.33 km/h) |
| 50 mph (80.47 km/h) | 49.94 mph (80.36 km/h) |
| 55 mph (88.51 km/h) | 54.93 mph (88.4 km/h) |
| 60 mph (96.56 km/h) | 59.92 mph (96.44 km/h) |
| 65 mph (104.61 km/h) | 64.92 mph (104.47 km/h) |
| 70 mph (112.65 km/h) | 69.91 mph (112.51 km/h) |
| 75 mph (120.7 km/h) | 74.9 mph (120.55 km/h) |
| 80 mph (128.75 km/h) | 79.9 mph (128.58 km/h) |
| 85 mph (136.79 km/h) | 84.89 mph (136.62 km/h) |
| 90 mph (144.84 km/h) | 89.88 mph (144.65 km/h) |
| 95 mph (152.89 km/h) | 94.88 mph (152.69 km/h) |
| 100 mph (160.93 km/h) | 99.87 mph (160.73 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 | 1991 | 2144 | 2238 | 2341 | 2413 | 2494 | 2588 | 2720 | 2851 | 2997 | 3113 | 3325 | 3558 | 3741 | 3857 | 3923 | 4163 | 4499 | 5228 |
Better Fuel Economy Factory Ratios Increased Power
