Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-19 | 265/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.13 (714.6) | 28.35 (720) | 0.21 (5.4) 0.8% |
| Width inches (mm) | 5.71 (145) | 10.43 (265) | 4.72 (120) 82.8% |
| Circum. inches (mm) | 88.39 (2244.98) | 89.05 (2261.95) | 0.67 (16.96) 0.8% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.17 (106) | -0.39 (-10) -8.6% |
| Revolutions per mile (km) | 716.86 (445.44) | 711.49 (442.1) | -5.38 (-3.34) -0.8% |
265/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.15 mph (32.43 km/h) |
| 25 mph (40.23 km/h) | 25.19 mph (40.54 km/h) |
| 30 mph (48.28 km/h) | 30.23 mph (48.65 km/h) |
| 35 mph (56.33 km/h) | 35.26 mph (56.75 km/h) |
| 40 mph (64.37 km/h) | 40.3 mph (64.86 km/h) |
| 45 mph (72.42 km/h) | 45.34 mph (72.97 km/h) |
| 50 mph (80.47 km/h) | 50.38 mph (81.08 km/h) |
| 55 mph (88.51 km/h) | 55.42 mph (89.18 km/h) |
| 60 mph (96.56 km/h) | 60.45 mph (97.29 km/h) |
| 65 mph (104.61 km/h) | 65.49 mph (105.4 km/h) |
| 70 mph (112.65 km/h) | 70.53 mph (113.51 km/h) |
| 75 mph (120.7 km/h) | 75.57 mph (121.61 km/h) |
| 80 mph (128.75 km/h) | 80.6 mph (129.72 km/h) |
| 85 mph (136.79 km/h) | 85.64 mph (137.83 km/h) |
| 90 mph (144.84 km/h) | 90.68 mph (145.94 km/h) |
| 95 mph (152.89 km/h) | 95.72 mph (154.04 km/h) |
| 100 mph (160.93 km/h) | 100.76 mph (162.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1811 | 2103 | 2265 | 2365 | 2473 | 2550 | 2635 | 2735 | 2874 | 3013 | 3167 | 3290 | 3513 | 3760 | 3952 | 4076 | 4145 | 4399 | 4754 | 5524 |
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