Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/85-14 | 215/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.38 (670.1) | 24.31 (617.5) | -2.07 (-52.6) -7.8% |
| Width inches (mm) | 7.28 (185) | 8.46 (215) | 1.18 (30) 16.2% |
| Circum. inches (mm) | 82.88 (2105.18) | 76.38 (1939.93) | -6.51 (-165.25) -7.8% |
| Sidewall Height inches (mm) | 6.19 (157.25) | 4.66 (118.25) | -1.54 (-39) -24.8% |
| Revolutions per mile (km) | 764.47 (475.02) | 829.59 (515.48) | 65.12 (40.46) 8.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.43 mph (29.66 km/h) |
| 25 mph (40.23 km/h) | 23.04 mph (37.08 km/h) |
| 30 mph (48.28 km/h) | 27.65 mph (44.49 km/h) |
| 35 mph (56.33 km/h) | 32.25 mph (51.91 km/h) |
| 40 mph (64.37 km/h) | 36.86 mph (59.32 km/h) |
| 45 mph (72.42 km/h) | 41.47 mph (66.74 km/h) |
| 50 mph (80.47 km/h) | 46.08 mph (74.15 km/h) |
| 55 mph (88.51 km/h) | 50.68 mph (81.57 km/h) |
| 60 mph (96.56 km/h) | 55.29 mph (88.98 km/h) |
| 65 mph (104.61 km/h) | 59.9 mph (96.4 km/h) |
| 70 mph (112.65 km/h) | 64.51 mph (103.81 km/h) |
| 75 mph (120.7 km/h) | 69.11 mph (111.23 km/h) |
| 80 mph (128.75 km/h) | 73.72 mph (118.64 km/h) |
| 85 mph (136.79 km/h) | 78.33 mph (126.06 km/h) |
| 90 mph (144.84 km/h) | 82.94 mph (133.47 km/h) |
| 95 mph (152.89 km/h) | 87.54 mph (140.89 km/h) |
| 100 mph (160.93 km/h) | 92.15 mph (148.3 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2111 | 2453 | 2641 | 2758 | 2884 | 2974 | 3072 | 3189 | 3351 | 3513 | 3692 | 3836 | 4097 | 4384 | 4609 | 4752 | 4833 | 5130 | 5543 | 6441 |
Better Fuel Economy Factory Ratios Increased Power
