Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-18 | 275/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.25 (692.2) | 27.74 (704.7) | 0.49 (12.5) 1.8% |
| Width inches (mm) | 9.25 (235) | 10.83 (275) | 1.57 (40) 17% |
| Circum. inches (mm) | 85.61 (2174.61) | 87.16 (2213.88) | 1.55 (39.27) 1.8% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 4.87 (123.75) | 0.25 (6.25) 5.3% |
| Revolutions per mile (km) | 740.06 (459.85) | 726.93 (451.69) | -13.13 (-8.16) -1.8% |
275/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.77 km/h) |
| 25 mph (40.23 km/h) | 25.45 mph (40.96 km/h) |
| 30 mph (48.28 km/h) | 30.54 mph (49.15 km/h) |
| 35 mph (56.33 km/h) | 35.63 mph (57.34 km/h) |
| 40 mph (64.37 km/h) | 40.72 mph (65.54 km/h) |
| 45 mph (72.42 km/h) | 45.81 mph (73.73 km/h) |
| 50 mph (80.47 km/h) | 50.9 mph (81.92 km/h) |
| 55 mph (88.51 km/h) | 55.99 mph (90.11 km/h) |
| 60 mph (96.56 km/h) | 61.08 mph (98.3 km/h) |
| 65 mph (104.61 km/h) | 66.17 mph (106.5 km/h) |
| 70 mph (112.65 km/h) | 71.26 mph (114.69 km/h) |
| 75 mph (120.7 km/h) | 76.35 mph (122.88 km/h) |
| 80 mph (128.75 km/h) | 81.44 mph (131.07 km/h) |
| 85 mph (136.79 km/h) | 86.53 mph (139.26 km/h) |
| 90 mph (144.84 km/h) | 91.63 mph (147.46 km/h) |
| 95 mph (152.89 km/h) | 96.72 mph (155.65 km/h) |
| 100 mph (160.93 km/h) | 101.81 mph (163.84 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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