Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 275/25-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 35.41 (899.5) | -2.03 (-51.5) -5.4% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 117.62 (2987.65) | 111.25 (2825.86) | -6.37 (-161.79) -5.4% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 2.71 (68.75) | -1.01 (-25.75) -27.2% |
| Revolutions per mile (km) | 538.66 (334.71) | 569.51 (353.87) | 30.84 (19.16) 5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.92 mph (30.44 km/h) |
| 25 mph (40.23 km/h) | 23.65 mph (38.05 km/h) |
| 30 mph (48.28 km/h) | 28.38 mph (45.67 km/h) |
| 35 mph (56.33 km/h) | 33.1 mph (53.28 km/h) |
| 40 mph (64.37 km/h) | 37.83 mph (60.89 km/h) |
| 45 mph (72.42 km/h) | 42.56 mph (68.5 km/h) |
| 50 mph (80.47 km/h) | 47.29 mph (76.11 km/h) |
| 55 mph (88.51 km/h) | 52.02 mph (83.72 km/h) |
| 60 mph (96.56 km/h) | 56.75 mph (91.33 km/h) |
| 65 mph (104.61 km/h) | 61.48 mph (98.94 km/h) |
| 70 mph (112.65 km/h) | 66.21 mph (106.55 km/h) |
| 75 mph (120.7 km/h) | 70.94 mph (114.16 km/h) |
| 80 mph (128.75 km/h) | 75.67 mph (121.78 km/h) |
| 85 mph (136.79 km/h) | 80.4 mph (129.39 km/h) |
| 90 mph (144.84 km/h) | 85.13 mph (137 km/h) |
| 95 mph (152.89 km/h) | 89.86 mph (144.61 km/h) |
| 100 mph (160.93 km/h) | 94.58 mph (152.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1449 | 1684 | 1813 | 1893 | 1980 | 2041 | 2109 | 2189 | 2300 | 2411 | 2535 | 2633 | 2812 | 3010 | 3164 | 3262 | 3318 | 3521 | 3805 | 4422 |
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