Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/70-17 | 235/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.61 (802.8) | 30.03 (762.7) | -1.58 (-40.1) -5% |
| Width inches (mm) | 10.43 (265) | 9.25 (235) | -1.18 (-30) -11.3% |
| Circum. inches (mm) | 99.29 (2522.07) | 94.33 (2396.09) | -4.96 (-125.98) -5% |
| Sidewall Height inches (mm) | 7.3 (185.5) | 6.01 (152.75) | -1.29 (-32.75) -17.7% |
| Revolutions per mile (km) | 638.1 (396.5) | 671.65 (417.35) | 33.55 (20.85) 5.3% |
235/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19 mph (30.58 km/h) |
| 25 mph (40.23 km/h) | 23.75 mph (38.22 km/h) |
| 30 mph (48.28 km/h) | 28.5 mph (45.87 km/h) |
| 35 mph (56.33 km/h) | 33.25 mph (53.51 km/h) |
| 40 mph (64.37 km/h) | 38 mph (61.16 km/h) |
| 45 mph (72.42 km/h) | 42.75 mph (68.8 km/h) |
| 50 mph (80.47 km/h) | 47.5 mph (76.45 km/h) |
| 55 mph (88.51 km/h) | 52.25 mph (84.09 km/h) |
| 60 mph (96.56 km/h) | 57 mph (91.74 km/h) |
| 65 mph (104.61 km/h) | 61.75 mph (99.38 km/h) |
| 70 mph (112.65 km/h) | 66.5 mph (107.03 km/h) |
| 75 mph (120.7 km/h) | 71.25 mph (114.67 km/h) |
| 80 mph (128.75 km/h) | 76 mph (122.32 km/h) |
| 85 mph (136.79 km/h) | 80.75 mph (129.96 km/h) |
| 90 mph (144.84 km/h) | 85.5 mph (137.61 km/h) |
| 95 mph (152.89 km/h) | 90.25 mph (145.25 km/h) |
| 100 mph (160.93 km/h) | 95 mph (152.9 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
