Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/85-16 | 225/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.71 (703.9) | 25.31 (643) | -2.4 (-60.9) -8.7% |
| Width inches (mm) | 6.89 (175) | 8.86 (225) | 1.97 (50) 28.6% |
| Circum. inches (mm) | 87.06 (2211.37) | 79.53 (2020.04) | -7.53 (-191.32) -8.7% |
| Sidewall Height inches (mm) | 5.86 (148.75) | 2.66 (67.5) | -3.2 (-81.25) -54.6% |
| Revolutions per mile (km) | 727.76 (452.21) | 796.69 (495.04) | 68.93 (42.83) 9.5% |
225/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.27 mph (29.4 km/h) |
| 25 mph (40.23 km/h) | 22.84 mph (36.75 km/h) |
| 30 mph (48.28 km/h) | 27.4 mph (44.1 km/h) |
| 35 mph (56.33 km/h) | 31.97 mph (51.45 km/h) |
| 40 mph (64.37 km/h) | 36.54 mph (58.8 km/h) |
| 45 mph (72.42 km/h) | 41.11 mph (66.15 km/h) |
| 50 mph (80.47 km/h) | 45.67 mph (73.51 km/h) |
| 55 mph (88.51 km/h) | 50.24 mph (80.86 km/h) |
| 60 mph (96.56 km/h) | 54.81 mph (88.21 km/h) |
| 65 mph (104.61 km/h) | 59.38 mph (95.56 km/h) |
| 70 mph (112.65 km/h) | 63.94 mph (102.91 km/h) |
| 75 mph (120.7 km/h) | 68.51 mph (110.26 km/h) |
| 80 mph (128.75 km/h) | 73.08 mph (117.61 km/h) |
| 85 mph (136.79 km/h) | 77.65 mph (124.96 km/h) |
| 90 mph (144.84 km/h) | 82.21 mph (132.31 km/h) |
| 95 mph (152.89 km/h) | 86.78 mph (139.66 km/h) |
| 100 mph (160.93 km/h) | 91.35 mph (147.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2027 | 2355 | 2536 | 2649 | 2769 | 2856 | 2951 | 3063 | 3218 | 3373 | 3546 | 3684 | 3934 | 4210 | 4426 | 4564 | 4641 | 4926 | 5323 | 6186 |
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