Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 185/60-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.74 (552.2) | 1.24 (31.4) 6% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 64.42 (1636.14) | 68.3 (1734.79) | 3.88 (98.65) 6% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.37 (111) | 0.12 (3) 2.8% |
| Revolutions per mile (km) | 983.62 (611.19) | 927.69 (576.44) | -55.93 (-34.75) -5.7% |
185/60-13 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.21 mph (34.13 km/h) |
| 25 mph (40.23 km/h) | 26.51 mph (42.66 km/h) |
| 30 mph (48.28 km/h) | 31.81 mph (51.19 km/h) |
| 35 mph (56.33 km/h) | 37.11 mph (59.72 km/h) |
| 40 mph (64.37 km/h) | 42.41 mph (68.26 km/h) |
| 45 mph (72.42 km/h) | 47.71 mph (76.79 km/h) |
| 50 mph (80.47 km/h) | 53.01 mph (85.32 km/h) |
| 55 mph (88.51 km/h) | 58.32 mph (93.85 km/h) |
| 60 mph (96.56 km/h) | 63.62 mph (102.38 km/h) |
| 65 mph (104.61 km/h) | 68.92 mph (110.91 km/h) |
| 70 mph (112.65 km/h) | 74.22 mph (119.45 km/h) |
| 75 mph (120.7 km/h) | 79.52 mph (127.98 km/h) |
| 80 mph (128.75 km/h) | 84.82 mph (136.51 km/h) |
| 85 mph (136.79 km/h) | 90.12 mph (145.04 km/h) |
| 90 mph (144.84 km/h) | 95.43 mph (153.57 km/h) |
| 95 mph (152.89 km/h) | 100.73 mph (162.11 km/h) |
| 100 mph (160.93 km/h) | 106.03 mph (170.64 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
