Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-19 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.76 (730.6) | 30.98 (786.84) | 2.21 (56.24) 7.7% |
| Width inches (mm) | 6.1 (155) | 10.51 (267) | 4.41 (112) 72.3% |
| Circum. inches (mm) | 90.36 (2295.25) | 97.32 (2471.93) | 6.96 (176.68) 7.7% |
| Sidewall Height inches (mm) | 4.88 (124) | 7.99 (202.92) | 3.11 (78.92) 63.6% |
| Revolutions per mile (km) | 701.16 (435.68) | 651.05 (404.54) | -50.12 (-31.14) -7.1% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.54 mph (34.66 km/h) |
| 25 mph (40.23 km/h) | 26.92 mph (43.33 km/h) |
| 30 mph (48.28 km/h) | 32.31 mph (52 km/h) |
| 35 mph (56.33 km/h) | 37.69 mph (60.66 km/h) |
| 40 mph (64.37 km/h) | 43.08 mph (69.33 km/h) |
| 45 mph (72.42 km/h) | 48.46 mph (78 km/h) |
| 50 mph (80.47 km/h) | 53.85 mph (86.66 km/h) |
| 55 mph (88.51 km/h) | 59.23 mph (95.33 km/h) |
| 60 mph (96.56 km/h) | 64.62 mph (103.99 km/h) |
| 65 mph (104.61 km/h) | 70 mph (112.66 km/h) |
| 70 mph (112.65 km/h) | 75.39 mph (121.33 km/h) |
| 75 mph (120.7 km/h) | 80.77 mph (129.99 km/h) |
| 80 mph (128.75 km/h) | 86.16 mph (138.66 km/h) |
| 85 mph (136.79 km/h) | 91.54 mph (147.32 km/h) |
| 90 mph (144.84 km/h) | 96.93 mph (155.99 km/h) |
| 95 mph (152.89 km/h) | 102.31 mph (164.66 km/h) |
| 100 mph (160.93 km/h) | 107.7 mph (173.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1657 | 1925 | 2073 | 2164 | 2263 | 2334 | 2411 | 2503 | 2630 | 2757 | 2898 | 3010 | 3215 | 3440 | 3617 | 3730 | 3793 | 4026 | 4350 | 5055 |
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