Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/40-18 | 285/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.35 (669.2) | 26.98 (685.2) | 0.63 (16) 2.4% |
| Width inches (mm) | 10.43 (265) | 11.22 (285) | 0.79 (20) 7.5% |
| Circum. inches (mm) | 82.77 (2102.35) | 84.75 (2152.62) | 1.98 (50.27) 2.4% |
| Sidewall Height inches (mm) | 4.17 (106) | 4.49 (114) | 0.31 (8) 7.5% |
| Revolutions per mile (km) | 765.5 (475.66) | 747.62 (464.55) | -17.87 (-11.11) -2.3% |
285/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.48 mph (32.96 km/h) |
| 25 mph (40.23 km/h) | 25.6 mph (41.2 km/h) |
| 30 mph (48.28 km/h) | 30.72 mph (49.43 km/h) |
| 35 mph (56.33 km/h) | 35.84 mph (57.67 km/h) |
| 40 mph (64.37 km/h) | 40.96 mph (65.91 km/h) |
| 45 mph (72.42 km/h) | 46.08 mph (74.15 km/h) |
| 50 mph (80.47 km/h) | 51.2 mph (82.39 km/h) |
| 55 mph (88.51 km/h) | 56.32 mph (90.63 km/h) |
| 60 mph (96.56 km/h) | 61.43 mph (98.87 km/h) |
| 65 mph (104.61 km/h) | 66.55 mph (107.11 km/h) |
| 70 mph (112.65 km/h) | 71.67 mph (115.35 km/h) |
| 75 mph (120.7 km/h) | 76.79 mph (123.59 km/h) |
| 80 mph (128.75 km/h) | 81.91 mph (131.83 km/h) |
| 85 mph (136.79 km/h) | 87.03 mph (140.07 km/h) |
| 90 mph (144.84 km/h) | 92.15 mph (148.3 km/h) |
| 95 mph (152.89 km/h) | 97.27 mph (156.54 km/h) |
| 100 mph (160.93 km/h) | 102.39 mph (164.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1903 | 2210 | 2380 | 2485 | 2599 | 2680 | 2769 | 2874 | 3020 | 3166 | 3327 | 3457 | 3692 | 3951 | 4153 | 4283 | 4356 | 4623 | 4995 | 5805 |
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