Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-19 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.18 (741.1) | 27.74 (704.7) | -1.43 (-36.4) -4.9% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 91.66 (2328.23) | 87.16 (2213.88) | -4.5 (-114.35) -4.9% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.87 (123.75) | -0.22 (-5.5) -4.3% |
| Revolutions per mile (km) | 691.23 (429.51) | 726.93 (451.69) | 35.7 (22.19) 5.2% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.02 mph (30.61 km/h) |
| 25 mph (40.23 km/h) | 23.77 mph (38.26 km/h) |
| 30 mph (48.28 km/h) | 28.53 mph (45.91 km/h) |
| 35 mph (56.33 km/h) | 33.28 mph (53.56 km/h) |
| 40 mph (64.37 km/h) | 38.04 mph (61.21 km/h) |
| 45 mph (72.42 km/h) | 42.79 mph (68.86 km/h) |
| 50 mph (80.47 km/h) | 47.54 mph (76.52 km/h) |
| 55 mph (88.51 km/h) | 52.3 mph (84.17 km/h) |
| 60 mph (96.56 km/h) | 57.05 mph (91.82 km/h) |
| 65 mph (104.61 km/h) | 61.81 mph (99.47 km/h) |
| 70 mph (112.65 km/h) | 66.56 mph (107.12 km/h) |
| 75 mph (120.7 km/h) | 71.32 mph (114.77 km/h) |
| 80 mph (128.75 km/h) | 76.07 mph (122.42 km/h) |
| 85 mph (136.79 km/h) | 80.83 mph (130.08 km/h) |
| 90 mph (144.84 km/h) | 85.58 mph (137.73 km/h) |
| 95 mph (152.89 km/h) | 90.33 mph (145.38 km/h) |
| 100 mph (160.93 km/h) | 95.09 mph (153.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1850 | 2149 | 2314 | 2417 | 2527 | 2606 | 2692 | 2795 | 2936 | 3078 | 3235 | 3361 | 3590 | 3842 | 4038 | 4164 | 4235 | 4495 | 4857 | 5644 |
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