Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-18 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.69 (754.2) | 27.74 (704.7) | -1.95 (-49.5) -6.6% |
| Width inches (mm) | 6.5 (165) | 8.86 (225) | 2.36 (60) 36.4% |
| Circum. inches (mm) | 93.28 (2369.39) | 87.16 (2213.88) | -6.12 (-155.51) -6.6% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4.87 (123.75) | -0.97 (-24.75) -16.7% |
| Revolutions per mile (km) | 679.22 (422.05) | 726.93 (451.69) | 47.71 (29.65) 7% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.69 mph (30.07 km/h) |
| 25 mph (40.23 km/h) | 23.36 mph (37.59 km/h) |
| 30 mph (48.28 km/h) | 28.03 mph (45.11 km/h) |
| 35 mph (56.33 km/h) | 32.7 mph (52.63 km/h) |
| 40 mph (64.37 km/h) | 37.37 mph (60.15 km/h) |
| 45 mph (72.42 km/h) | 42.05 mph (67.67 km/h) |
| 50 mph (80.47 km/h) | 46.72 mph (75.19 km/h) |
| 55 mph (88.51 km/h) | 51.39 mph (82.7 km/h) |
| 60 mph (96.56 km/h) | 56.06 mph (90.22 km/h) |
| 65 mph (104.61 km/h) | 60.73 mph (97.74 km/h) |
| 70 mph (112.65 km/h) | 65.41 mph (105.26 km/h) |
| 75 mph (120.7 km/h) | 70.08 mph (112.78 km/h) |
| 80 mph (128.75 km/h) | 74.75 mph (120.3 km/h) |
| 85 mph (136.79 km/h) | 79.42 mph (127.82 km/h) |
| 90 mph (144.84 km/h) | 84.09 mph (135.33 km/h) |
| 95 mph (152.89 km/h) | 88.76 mph (142.85 km/h) |
| 100 mph (160.93 km/h) | 93.44 mph (150.37 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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