Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 215/35-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 17.93 (455.3) | -0.85 (-21.5) -4.5% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 58.97 (1497.91) | 56.31 (1430.37) | -2.66 (-67.54) -4.5% |
| Sidewall Height inches (mm) | 3.39 (86) | 2.96 (75.25) | -0.42 (-10.75) -12.5% |
| Revolutions per mile (km) | 1074.39 (667.59) | 1125.13 (699.12) | 50.73 (31.52) 4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.1 mph (30.74 km/h) |
| 25 mph (40.23 km/h) | 23.87 mph (38.42 km/h) |
| 30 mph (48.28 km/h) | 28.65 mph (46.1 km/h) |
| 35 mph (56.33 km/h) | 33.42 mph (53.79 km/h) |
| 40 mph (64.37 km/h) | 38.2 mph (61.47 km/h) |
| 45 mph (72.42 km/h) | 42.97 mph (69.16 km/h) |
| 50 mph (80.47 km/h) | 47.75 mph (76.84 km/h) |
| 55 mph (88.51 km/h) | 52.52 mph (84.52 km/h) |
| 60 mph (96.56 km/h) | 57.29 mph (92.21 km/h) |
| 65 mph (104.61 km/h) | 62.07 mph (99.89 km/h) |
| 70 mph (112.65 km/h) | 66.84 mph (107.57 km/h) |
| 75 mph (120.7 km/h) | 71.62 mph (115.26 km/h) |
| 80 mph (128.75 km/h) | 76.39 mph (122.94 km/h) |
| 85 mph (136.79 km/h) | 81.17 mph (130.63 km/h) |
| 90 mph (144.84 km/h) | 85.94 mph (138.31 km/h) |
| 95 mph (152.89 km/h) | 90.72 mph (145.99 km/h) |
| 100 mph (160.93 km/h) | 95.49 mph (153.68 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
