Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-12 | 215/40-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.77 (476.8) | 19.77 (502.2) | 1 (25.4) 5.3% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 58.97 (1497.91) | 62.11 (1577.71) | 3.14 (79.8) 5.3% |
| Sidewall Height inches (mm) | 3.39 (86) | 3.39 (86) | 0 (0) 0% |
| Revolutions per mile (km) | 1074.39 (667.59) | 1020.05 (633.83) | -54.34 (-33.77) -5.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.07 mph (33.9 km/h) |
| 25 mph (40.23 km/h) | 26.33 mph (42.38 km/h) |
| 30 mph (48.28 km/h) | 31.6 mph (50.85 km/h) |
| 35 mph (56.33 km/h) | 36.86 mph (59.33 km/h) |
| 40 mph (64.37 km/h) | 42.13 mph (67.8 km/h) |
| 45 mph (72.42 km/h) | 47.4 mph (76.28 km/h) |
| 50 mph (80.47 km/h) | 52.66 mph (84.75 km/h) |
| 55 mph (88.51 km/h) | 57.93 mph (93.23 km/h) |
| 60 mph (96.56 km/h) | 63.2 mph (101.7 km/h) |
| 65 mph (104.61 km/h) | 68.46 mph (110.18 km/h) |
| 70 mph (112.65 km/h) | 73.73 mph (118.66 km/h) |
| 75 mph (120.7 km/h) | 79 mph (127.13 km/h) |
| 80 mph (128.75 km/h) | 84.26 mph (135.61 km/h) |
| 85 mph (136.79 km/h) | 89.53 mph (144.08 km/h) |
| 90 mph (144.84 km/h) | 94.79 mph (152.56 km/h) |
| 95 mph (152.89 km/h) | 100.06 mph (161.03 km/h) |
| 100 mph (160.93 km/h) | 105.33 mph (169.51 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
