Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 235/40-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 20.4 (518.2) | -3.57 (-90.8) -14.9% |
| Width inches (mm) | 11.22 (285) | 9.25 (235) | -1.97 (-50) -17.5% |
| Circum. inches (mm) | 75.32 (1913.23) | 64.09 (1627.97) | -11.23 (-285.26) -14.9% |
| Sidewall Height inches (mm) | 4.49 (114) | 3.7 (94) | -0.79 (-20) -17.5% |
| Revolutions per mile (km) | 841.17 (522.68) | 988.56 (614.26) | 147.39 (91.58) 17.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.02 mph (27.39 km/h) |
| 25 mph (40.23 km/h) | 21.27 mph (34.23 km/h) |
| 30 mph (48.28 km/h) | 25.53 mph (41.08 km/h) |
| 35 mph (56.33 km/h) | 29.78 mph (47.93 km/h) |
| 40 mph (64.37 km/h) | 34.04 mph (54.78 km/h) |
| 45 mph (72.42 km/h) | 38.29 mph (61.62 km/h) |
| 50 mph (80.47 km/h) | 42.55 mph (68.47 km/h) |
| 55 mph (88.51 km/h) | 46.8 mph (75.32 km/h) |
| 60 mph (96.56 km/h) | 51.05 mph (82.16 km/h) |
| 65 mph (104.61 km/h) | 55.31 mph (89.01 km/h) |
| 70 mph (112.65 km/h) | 59.56 mph (95.86 km/h) |
| 75 mph (120.7 km/h) | 63.82 mph (102.7 km/h) |
| 80 mph (128.75 km/h) | 68.07 mph (109.55 km/h) |
| 85 mph (136.79 km/h) | 72.33 mph (116.4 km/h) |
| 90 mph (144.84 km/h) | 76.58 mph (123.25 km/h) |
| 95 mph (152.89 km/h) | 80.84 mph (130.09 km/h) |
| 100 mph (160.93 km/h) | 85.09 mph (136.94 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
