Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 275/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 36.5 (927) | -0.94 (-24) -2.5% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 117.62 (2987.65) | 114.66 (2912.26) | -2.97 (-75.4) -2.5% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.25 (82.5) | -0.47 (-12) -12.7% |
| Revolutions per mile (km) | 538.66 (334.71) | 552.61 (343.38) | 13.95 (8.67) 2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.5 mph (31.37 km/h) |
| 25 mph (40.23 km/h) | 24.37 mph (39.22 km/h) |
| 30 mph (48.28 km/h) | 29.24 mph (47.06 km/h) |
| 35 mph (56.33 km/h) | 34.12 mph (54.91 km/h) |
| 40 mph (64.37 km/h) | 38.99 mph (62.75 km/h) |
| 45 mph (72.42 km/h) | 43.86 mph (70.59 km/h) |
| 50 mph (80.47 km/h) | 48.74 mph (78.44 km/h) |
| 55 mph (88.51 km/h) | 53.61 mph (86.28 km/h) |
| 60 mph (96.56 km/h) | 58.49 mph (94.12 km/h) |
| 65 mph (104.61 km/h) | 63.36 mph (101.97 km/h) |
| 70 mph (112.65 km/h) | 68.23 mph (109.81 km/h) |
| 75 mph (120.7 km/h) | 73.11 mph (117.65 km/h) |
| 80 mph (128.75 km/h) | 77.98 mph (125.5 km/h) |
| 85 mph (136.79 km/h) | 82.85 mph (133.34 km/h) |
| 90 mph (144.84 km/h) | 87.73 mph (141.19 km/h) |
| 95 mph (152.89 km/h) | 92.6 mph (149.03 km/h) |
| 100 mph (160.93 km/h) | 97.48 mph (156.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1406 | 1634 | 1759 | 1837 | 1921 | 1981 | 2047 | 2124 | 2232 | 2340 | 2460 | 2555 | 2729 | 2920 | 3070 | 3166 | 3220 | 3417 | 3692 | 4291 |
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