Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-21 | 165/80-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.33 (744.9) | 27.39 (695.8) | -1.93 (-49.1) -6.6% |
| Width inches (mm) | 9.25 (235) | 6.5 (165) | -2.76 (-70) -29.8% |
| Circum. inches (mm) | 92.13 (2340.17) | 86.06 (2185.92) | -6.07 (-154.25) -6.6% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 5.2 (132) | 1.03 (26.25) 24.8% |
| Revolutions per mile (km) | 687.7 (427.32) | 736.23 (457.47) | 48.53 (30.15) 7.1% |
165/80-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.68 mph (30.07 km/h) |
| 25 mph (40.23 km/h) | 23.35 mph (37.58 km/h) |
| 30 mph (48.28 km/h) | 28.02 mph (45.1 km/h) |
| 35 mph (56.33 km/h) | 32.69 mph (52.61 km/h) |
| 40 mph (64.37 km/h) | 37.36 mph (60.13 km/h) |
| 45 mph (72.42 km/h) | 42.03 mph (67.65 km/h) |
| 50 mph (80.47 km/h) | 46.7 mph (75.16 km/h) |
| 55 mph (88.51 km/h) | 51.37 mph (82.68 km/h) |
| 60 mph (96.56 km/h) | 56.05 mph (90.2 km/h) |
| 65 mph (104.61 km/h) | 60.72 mph (97.71 km/h) |
| 70 mph (112.65 km/h) | 65.39 mph (105.23 km/h) |
| 75 mph (120.7 km/h) | 70.06 mph (112.75 km/h) |
| 80 mph (128.75 km/h) | 74.73 mph (120.26 km/h) |
| 85 mph (136.79 km/h) | 79.4 mph (127.78 km/h) |
| 90 mph (144.84 km/h) | 84.07 mph (135.29 km/h) |
| 95 mph (152.89 km/h) | 88.74 mph (142.81 km/h) |
| 100 mph (160.93 km/h) | 93.41 mph (150.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1874 | 2177 | 2344 | 2448 | 2559 | 2639 | 2727 | 2830 | 2974 | 3117 | 3277 | 3404 | 3636 | 3891 | 4090 | 4218 | 4289 | 4552 | 4919 | 5716 |
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