Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/65-18 | 235/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.03 (762.7) | 30.95 (786.2) | 0.93 (23.5) 3.1% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 94.33 (2396.09) | 97.24 (2469.92) | 2.91 (73.83) 3.1% |
| Sidewall Height inches (mm) | 6.01 (152.75) | 6.48 (164.5) | 0.46 (11.75) 7.7% |
| Revolutions per mile (km) | 671.65 (417.35) | 651.58 (404.87) | -20.08 (-12.47) -3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.62 mph (33.18 km/h) |
| 25 mph (40.23 km/h) | 25.77 mph (41.47 km/h) |
| 30 mph (48.28 km/h) | 30.92 mph (49.77 km/h) |
| 35 mph (56.33 km/h) | 36.08 mph (58.06 km/h) |
| 40 mph (64.37 km/h) | 41.23 mph (66.36 km/h) |
| 45 mph (72.42 km/h) | 46.39 mph (74.65 km/h) |
| 50 mph (80.47 km/h) | 51.54 mph (82.95 km/h) |
| 55 mph (88.51 km/h) | 56.69 mph (91.24 km/h) |
| 60 mph (96.56 km/h) | 61.85 mph (99.54 km/h) |
| 65 mph (104.61 km/h) | 67 mph (107.83 km/h) |
| 70 mph (112.65 km/h) | 72.16 mph (116.13 km/h) |
| 75 mph (120.7 km/h) | 77.31 mph (124.42 km/h) |
| 80 mph (128.75 km/h) | 82.46 mph (132.71 km/h) |
| 85 mph (136.79 km/h) | 87.62 mph (141.01 km/h) |
| 90 mph (144.84 km/h) | 92.77 mph (149.3 km/h) |
| 95 mph (152.89 km/h) | 97.93 mph (157.6 km/h) |
| 100 mph (160.93 km/h) | 103.08 mph (165.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1658 | 1926 | 2074 | 2166 | 2265 | 2336 | 2413 | 2505 | 2632 | 2759 | 2900 | 3013 | 3217 | 3443 | 3620 | 3733 | 3796 | 4029 | 4353 | 5059 |
Better Fuel Economy Factory Ratios Increased Power
