Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-18 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.33 (668.7) | 27.74 (704.7) | 1.42 (36) 5.4% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 82.71 (2100.78) | 87.16 (2213.88) | 4.45 (113.1) 5.4% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 4.87 (123.75) | 0.71 (18) 17% |
| Revolutions per mile (km) | 766.07 (476.01) | 726.93 (451.69) | -39.14 (-24.32) -5.1% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.08 mph (33.92 km/h) |
| 25 mph (40.23 km/h) | 26.35 mph (42.4 km/h) |
| 30 mph (48.28 km/h) | 31.62 mph (50.88 km/h) |
| 35 mph (56.33 km/h) | 36.88 mph (59.36 km/h) |
| 40 mph (64.37 km/h) | 42.15 mph (67.84 km/h) |
| 45 mph (72.42 km/h) | 47.42 mph (76.32 km/h) |
| 50 mph (80.47 km/h) | 52.69 mph (84.8 km/h) |
| 55 mph (88.51 km/h) | 57.96 mph (93.28 km/h) |
| 60 mph (96.56 km/h) | 63.23 mph (101.76 km/h) |
| 65 mph (104.61 km/h) | 68.5 mph (110.24 km/h) |
| 70 mph (112.65 km/h) | 73.77 mph (118.72 km/h) |
| 75 mph (120.7 km/h) | 79.04 mph (127.2 km/h) |
| 80 mph (128.75 km/h) | 84.31 mph (135.68 km/h) |
| 85 mph (136.79 km/h) | 89.58 mph (144.16 km/h) |
| 90 mph (144.84 km/h) | 94.85 mph (152.64 km/h) |
| 95 mph (152.89 km/h) | 100.11 mph (161.12 km/h) |
| 100 mph (160.93 km/h) | 105.38 mph (169.6 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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