Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 335/30-20 | 305/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.91 (709) | 27.2 (691) | -0.71 (-18) -2.5% |
| Width inches (mm) | 13.19 (335) | 12.01 (305) | -1.18 (-30) -9% |
| Circum. inches (mm) | 87.69 (2227.39) | 85.47 (2170.84) | -2.23 (-56.55) -2.5% |
| Sidewall Height inches (mm) | 3.96 (100.5) | 3.6 (91.5) | -0.35 (-9) -9% |
| Revolutions per mile (km) | 722.52 (448.96) | 741.35 (460.65) | 18.82 (11.69) 2.6% |
305/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.49 mph (31.37 km/h) |
| 25 mph (40.23 km/h) | 24.37 mph (39.21 km/h) |
| 30 mph (48.28 km/h) | 29.24 mph (47.05 km/h) |
| 35 mph (56.33 km/h) | 34.11 mph (54.9 km/h) |
| 40 mph (64.37 km/h) | 38.98 mph (62.74 km/h) |
| 45 mph (72.42 km/h) | 43.86 mph (70.58 km/h) |
| 50 mph (80.47 km/h) | 48.73 mph (78.42 km/h) |
| 55 mph (88.51 km/h) | 53.6 mph (86.27 km/h) |
| 60 mph (96.56 km/h) | 58.48 mph (94.11 km/h) |
| 65 mph (104.61 km/h) | 63.35 mph (101.95 km/h) |
| 70 mph (112.65 km/h) | 68.22 mph (109.79 km/h) |
| 75 mph (120.7 km/h) | 73.1 mph (117.64 km/h) |
| 80 mph (128.75 km/h) | 77.97 mph (125.48 km/h) |
| 85 mph (136.79 km/h) | 82.84 mph (133.32 km/h) |
| 90 mph (144.84 km/h) | 87.72 mph (141.16 km/h) |
| 95 mph (152.89 km/h) | 92.59 mph (149.01 km/h) |
| 100 mph (160.93 km/h) | 97.46 mph (156.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1887 | 2192 | 2360 | 2465 | 2577 | 2657 | 2746 | 2850 | 2994 | 3139 | 3300 | 3428 | 3661 | 3918 | 4118 | 4247 | 4319 | 4584 | 4953 | 5756 |
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