Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 235/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 29.03 (737.3) | 1.32 (33.6) 4.8% |
| Width inches (mm) | 5.71 (145) | 9.25 (235) | 3.54 (90) 62.1% |
| Circum. inches (mm) | 87.04 (2210.74) | 91.19 (2316.3) | 4.16 (105.56) 4.8% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 6.01 (152.75) | 1.16 (29.5) 23.9% |
| Revolutions per mile (km) | 727.97 (452.34) | 694.79 (431.72) | -33.17 (-20.61) -4.6% |
235/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.95 mph (33.72 km/h) |
| 25 mph (40.23 km/h) | 26.19 mph (42.15 km/h) |
| 30 mph (48.28 km/h) | 31.43 mph (50.59 km/h) |
| 35 mph (56.33 km/h) | 36.67 mph (59.02 km/h) |
| 40 mph (64.37 km/h) | 41.91 mph (67.45 km/h) |
| 45 mph (72.42 km/h) | 47.15 mph (75.88 km/h) |
| 50 mph (80.47 km/h) | 52.39 mph (84.31 km/h) |
| 55 mph (88.51 km/h) | 57.63 mph (92.74 km/h) |
| 60 mph (96.56 km/h) | 62.86 mph (101.17 km/h) |
| 65 mph (104.61 km/h) | 68.1 mph (109.6 km/h) |
| 70 mph (112.65 km/h) | 73.34 mph (118.03 km/h) |
| 75 mph (120.7 km/h) | 78.58 mph (126.46 km/h) |
| 80 mph (128.75 km/h) | 83.82 mph (134.9 km/h) |
| 85 mph (136.79 km/h) | 89.06 mph (143.33 km/h) |
| 90 mph (144.84 km/h) | 94.3 mph (151.76 km/h) |
| 95 mph (152.89 km/h) | 99.54 mph (160.19 km/h) |
| 100 mph (160.93 km/h) | 104.77 mph (168.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1768 | 2054 | 2212 | 2310 | 2415 | 2490 | 2573 | 2671 | 2806 | 2942 | 3092 | 3213 | 3431 | 3672 | 3860 | 3980 | 4048 | 4296 | 4642 | 5395 |
Better Fuel Economy Factory Ratios Increased Power
