Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 235/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 28.88 (733.5) | 4.9 (124.5) 20.4% |
| Width inches (mm) | 11.22 (285) | 9.25 (235) | -1.97 (-50) -17.5% |
| Circum. inches (mm) | 75.32 (1913.23) | 90.72 (2304.36) | 15.4 (391.13) 20.4% |
| Sidewall Height inches (mm) | 4.49 (114) | 6.94 (176.25) | 2.45 (62.25) 54.6% |
| Revolutions per mile (km) | 841.17 (522.68) | 698.39 (433.96) | -142.77 (-88.72) -17% |
235/75-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.09 mph (38.77 km/h) |
| 25 mph (40.23 km/h) | 30.11 mph (48.46 km/h) |
| 30 mph (48.28 km/h) | 36.13 mph (58.15 km/h) |
| 35 mph (56.33 km/h) | 42.16 mph (67.84 km/h) |
| 40 mph (64.37 km/h) | 48.18 mph (77.53 km/h) |
| 45 mph (72.42 km/h) | 54.2 mph (87.23 km/h) |
| 50 mph (80.47 km/h) | 60.22 mph (96.92 km/h) |
| 55 mph (88.51 km/h) | 66.24 mph (106.61 km/h) |
| 60 mph (96.56 km/h) | 72.27 mph (116.3 km/h) |
| 65 mph (104.61 km/h) | 78.29 mph (125.99 km/h) |
| 70 mph (112.65 km/h) | 84.31 mph (135.68 km/h) |
| 75 mph (120.7 km/h) | 90.33 mph (145.38 km/h) |
| 80 mph (128.75 km/h) | 96.35 mph (155.07 km/h) |
| 85 mph (136.79 km/h) | 102.38 mph (164.76 km/h) |
| 90 mph (144.84 km/h) | 108.4 mph (174.45 km/h) |
| 95 mph (152.89 km/h) | 114.42 mph (184.14 km/h) |
| 100 mph (160.93 km/h) | 120.44 mph (193.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1777 | 2065 | 2223 | 2322 | 2428 | 2503 | 2586 | 2685 | 2821 | 2957 | 3108 | 3229 | 3449 | 3691 | 3880 | 4001 | 4069 | 4318 | 4666 | 5423 |
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