Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 36/12.5-16.5 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.03 (915.18) | 30.03 (762.7) | -6 (-152.48) -16.7% |
| Width inches (mm) | 12.52 (318) | 9.25 (235) | -3.27 (-83) -26.1% |
| Circum. inches (mm) | 113.19 (2875.12) | 94.33 (2396.09) | -18.86 (-479.03) -16.7% |
| Sidewall Height inches (mm) | 9.77 (248.04) | 6.01 (152.75) | -3.75 (-95.29) -38.4% |
| Revolutions per mile (km) | 559.75 (347.81) | 671.65 (417.35) | 111.91 (69.53) 20% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.67 mph (26.82 km/h) |
| 25 mph (40.23 km/h) | 20.83 mph (33.53 km/h) |
| 30 mph (48.28 km/h) | 25 mph (40.24 km/h) |
| 35 mph (56.33 km/h) | 29.17 mph (46.94 km/h) |
| 40 mph (64.37 km/h) | 33.34 mph (53.65 km/h) |
| 45 mph (72.42 km/h) | 37.5 mph (60.35 km/h) |
| 50 mph (80.47 km/h) | 41.67 mph (67.06 km/h) |
| 55 mph (88.51 km/h) | 45.84 mph (73.77 km/h) |
| 60 mph (96.56 km/h) | 50 mph (80.47 km/h) |
| 65 mph (104.61 km/h) | 54.17 mph (87.18 km/h) |
| 70 mph (112.65 km/h) | 58.34 mph (93.88 km/h) |
| 75 mph (120.7 km/h) | 62.5 mph (100.59 km/h) |
| 80 mph (128.75 km/h) | 66.67 mph (107.3 km/h) |
| 85 mph (136.79 km/h) | 70.84 mph (114 km/h) |
| 90 mph (144.84 km/h) | 75 mph (120.71 km/h) |
| 95 mph (152.89 km/h) | 79.17 mph (127.41 km/h) |
| 100 mph (160.93 km/h) | 83.34 mph (134.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1986 | 2138 | 2233 | 2335 | 2407 | 2487 | 2582 | 2713 | 2844 | 2989 | 3106 | 3317 | 3549 | 3731 | 3848 | 3913 | 4153 | 4488 | 5215 |
Better Fuel Economy Factory Ratios Increased Power
