Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-10 | 235/30-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.03 (458) | 17.55 (445.8) | -0.48 (-12.2) -2.7% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 56.65 (1438.85) | 55.14 (1400.52) | -1.51 (-38.33) -2.7% |
| Sidewall Height inches (mm) | 4.02 (102) | 2.78 (70.5) | -1.24 (-31.5) -30.9% |
| Revolutions per mile (km) | 1118.49 (695) | 1149.1 (714.02) | 30.61 (19.02) 2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.47 mph (31.33 km/h) |
| 25 mph (40.23 km/h) | 24.33 mph (39.16 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (46.99 km/h) |
| 35 mph (56.33 km/h) | 34.07 mph (54.83 km/h) |
| 40 mph (64.37 km/h) | 38.93 mph (62.66 km/h) |
| 45 mph (72.42 km/h) | 43.8 mph (70.49 km/h) |
| 50 mph (80.47 km/h) | 48.67 mph (78.32 km/h) |
| 55 mph (88.51 km/h) | 53.53 mph (86.16 km/h) |
| 60 mph (96.56 km/h) | 58.4 mph (93.99 km/h) |
| 65 mph (104.61 km/h) | 63.27 mph (101.82 km/h) |
| 70 mph (112.65 km/h) | 68.14 mph (109.65 km/h) |
| 75 mph (120.7 km/h) | 73 mph (117.49 km/h) |
| 80 mph (128.75 km/h) | 77.87 mph (125.32 km/h) |
| 85 mph (136.79 km/h) | 82.74 mph (133.15 km/h) |
| 90 mph (144.84 km/h) | 87.6 mph (140.98 km/h) |
| 95 mph (152.89 km/h) | 92.47 mph (148.82 km/h) |
| 100 mph (160.93 km/h) | 97.34 mph (156.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
