Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 265/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 26.35 (669.2) | 0.93 (23.7) 3.7% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 79.84 (2027.9) | 82.77 (2102.35) | 2.93 (74.46) 3.7% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 4.17 (106) | 1.47 (37.25) 54.2% |
| Revolutions per mile (km) | 793.6 (493.12) | 765.5 (475.66) | -28.11 (-17.46) -3.5% |
265/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.73 mph (33.37 km/h) |
| 25 mph (40.23 km/h) | 25.92 mph (41.71 km/h) |
| 30 mph (48.28 km/h) | 31.1 mph (50.05 km/h) |
| 35 mph (56.33 km/h) | 36.29 mph (58.4 km/h) |
| 40 mph (64.37 km/h) | 41.47 mph (66.74 km/h) |
| 45 mph (72.42 km/h) | 46.65 mph (75.08 km/h) |
| 50 mph (80.47 km/h) | 51.84 mph (83.42 km/h) |
| 55 mph (88.51 km/h) | 57.02 mph (91.76 km/h) |
| 60 mph (96.56 km/h) | 62.2 mph (100.11 km/h) |
| 65 mph (104.61 km/h) | 67.39 mph (108.45 km/h) |
| 70 mph (112.65 km/h) | 72.57 mph (116.79 km/h) |
| 75 mph (120.7 km/h) | 77.75 mph (125.13 km/h) |
| 80 mph (128.75 km/h) | 82.94 mph (133.47 km/h) |
| 85 mph (136.79 km/h) | 88.12 mph (141.82 km/h) |
| 90 mph (144.84 km/h) | 93.3 mph (150.16 km/h) |
| 95 mph (152.89 km/h) | 98.49 mph (158.5 km/h) |
| 100 mph (160.93 km/h) | 103.67 mph (166.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1948 | 2263 | 2437 | 2545 | 2661 | 2744 | 2835 | 2943 | 3092 | 3241 | 3407 | 3540 | 3780 | 4045 | 4253 | 4385 | 4460 | 4733 | 5115 | 5944 |
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