Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 245/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 29.54 (750.3) | 0.57 (14.4) 2% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 91.02 (2311.9) | 92.8 (2357.14) | 1.78 (45.24) 2% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 6.27 (159.25) | 2.28 (58) 57.3% |
| Revolutions per mile (km) | 696.11 (432.54) | 682.75 (424.24) | -13.36 (-8.3) -1.9% |
245/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.39 mph (32.82 km/h) |
| 25 mph (40.23 km/h) | 25.49 mph (41.02 km/h) |
| 30 mph (48.28 km/h) | 30.59 mph (49.23 km/h) |
| 35 mph (56.33 km/h) | 35.68 mph (57.43 km/h) |
| 40 mph (64.37 km/h) | 40.78 mph (65.63 km/h) |
| 45 mph (72.42 km/h) | 45.88 mph (73.84 km/h) |
| 50 mph (80.47 km/h) | 50.98 mph (82.04 km/h) |
| 55 mph (88.51 km/h) | 56.08 mph (90.25 km/h) |
| 60 mph (96.56 km/h) | 61.17 mph (98.45 km/h) |
| 65 mph (104.61 km/h) | 66.27 mph (106.65 km/h) |
| 70 mph (112.65 km/h) | 71.37 mph (114.86 km/h) |
| 75 mph (120.7 km/h) | 76.47 mph (123.06 km/h) |
| 80 mph (128.75 km/h) | 81.57 mph (131.27 km/h) |
| 85 mph (136.79 km/h) | 86.66 mph (139.47 km/h) |
| 90 mph (144.84 km/h) | 91.76 mph (147.68 km/h) |
| 95 mph (152.89 km/h) | 96.86 mph (155.88 km/h) |
| 100 mph (160.93 km/h) | 101.96 mph (164.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1737 | 2018 | 2174 | 2270 | 2373 | 2447 | 2529 | 2625 | 2758 | 2891 | 3039 | 3157 | 3371 | 3608 | 3793 | 3911 | 3978 | 4222 | 4562 | 5301 |
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