Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 235/85-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 31.73 (805.9) | 5.7 (144.7) 21.9% |
| Width inches (mm) | 4.72 (120) | 9.25 (235) | 4.53 (115) 95.8% |
| Circum. inches (mm) | 81.78 (2077.22) | 99.68 (2531.81) | 17.9 (454.59) 21.9% |
| Sidewall Height inches (mm) | 4.02 (102) | 7.86 (199.75) | 3.85 (97.75) 95.8% |
| Revolutions per mile (km) | 774.76 (481.41) | 635.65 (394.97) | -139.11 (-86.44) -18% |
235/85-16 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.38 mph (39.23 km/h) |
| 25 mph (40.23 km/h) | 30.47 mph (49.04 km/h) |
| 30 mph (48.28 km/h) | 36.57 mph (58.85 km/h) |
| 35 mph (56.33 km/h) | 42.66 mph (68.65 km/h) |
| 40 mph (64.37 km/h) | 48.75 mph (78.46 km/h) |
| 45 mph (72.42 km/h) | 54.85 mph (88.27 km/h) |
| 50 mph (80.47 km/h) | 60.94 mph (98.08 km/h) |
| 55 mph (88.51 km/h) | 67.04 mph (107.88 km/h) |
| 60 mph (96.56 km/h) | 73.13 mph (117.69 km/h) |
| 65 mph (104.61 km/h) | 79.22 mph (127.5 km/h) |
| 70 mph (112.65 km/h) | 85.32 mph (137.31 km/h) |
| 75 mph (120.7 km/h) | 91.41 mph (147.12 km/h) |
| 80 mph (128.75 km/h) | 97.51 mph (156.92 km/h) |
| 85 mph (136.79 km/h) | 103.6 mph (166.73 km/h) |
| 90 mph (144.84 km/h) | 109.7 mph (176.54 km/h) |
| 95 mph (152.89 km/h) | 115.79 mph (186.35 km/h) |
| 100 mph (160.93 km/h) | 121.88 mph (196.15 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1618 | 1879 | 2024 | 2113 | 2210 | 2278 | 2354 | 2444 | 2568 | 2691 | 2829 | 2939 | 3139 | 3359 | 3531 | 3641 | 3703 | 3930 | 4247 | 4935 |
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