Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 225/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 28.52 (724.3) | -0.46 (-11.6) -1.6% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 91.02 (2311.9) | 89.58 (2275.46) | -1.43 (-36.44) -1.6% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 5.76 (146.25) | 1.77 (45) 44.4% |
| Revolutions per mile (km) | 696.11 (432.54) | 707.26 (439.47) | 11.15 (6.93) 1.6% |
225/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.68 mph (31.68 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.6 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.52 km/h) |
| 35 mph (56.33 km/h) | 34.45 mph (55.44 km/h) |
| 40 mph (64.37 km/h) | 39.37 mph (63.36 km/h) |
| 45 mph (72.42 km/h) | 44.29 mph (71.28 km/h) |
| 50 mph (80.47 km/h) | 49.21 mph (79.2 km/h) |
| 55 mph (88.51 km/h) | 54.13 mph (87.12 km/h) |
| 60 mph (96.56 km/h) | 59.05 mph (95.04 km/h) |
| 65 mph (104.61 km/h) | 63.98 mph (102.96 km/h) |
| 70 mph (112.65 km/h) | 68.9 mph (110.88 km/h) |
| 75 mph (120.7 km/h) | 73.82 mph (118.8 km/h) |
| 80 mph (128.75 km/h) | 78.74 mph (126.72 km/h) |
| 85 mph (136.79 km/h) | 83.66 mph (134.64 km/h) |
| 90 mph (144.84 km/h) | 88.58 mph (142.56 km/h) |
| 95 mph (152.89 km/h) | 93.5 mph (150.48 km/h) |
| 100 mph (160.93 km/h) | 98.42 mph (158.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1800 | 2091 | 2252 | 2351 | 2459 | 2535 | 2619 | 2719 | 2857 | 2995 | 3148 | 3270 | 3492 | 3738 | 3929 | 4052 | 4121 | 4373 | 4726 | 5491 |
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