Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.2 (691) | 35.02 (889.6) | 7.82 (198.6) 28.7% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 85.47 (2170.84) | 110.03 (2794.76) | 24.56 (623.92) 28.7% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 7.51 (190.8) | 3.91 (99.3) 108.5% |
| Revolutions per mile (km) | 741.35 (460.65) | 575.84 (357.81) | -165.5 (-102.84) -22.3% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.75 mph (41.44 km/h) |
| 25 mph (40.23 km/h) | 32.19 mph (51.8 km/h) |
| 30 mph (48.28 km/h) | 38.62 mph (62.16 km/h) |
| 35 mph (56.33 km/h) | 45.06 mph (72.52 km/h) |
| 40 mph (64.37 km/h) | 51.5 mph (82.88 km/h) |
| 45 mph (72.42 km/h) | 57.93 mph (93.23 km/h) |
| 50 mph (80.47 km/h) | 64.37 mph (103.59 km/h) |
| 55 mph (88.51 km/h) | 70.81 mph (113.95 km/h) |
| 60 mph (96.56 km/h) | 77.24 mph (124.31 km/h) |
| 65 mph (104.61 km/h) | 83.68 mph (134.67 km/h) |
| 70 mph (112.65 km/h) | 90.12 mph (145.03 km/h) |
| 75 mph (120.7 km/h) | 96.56 mph (155.39 km/h) |
| 80 mph (128.75 km/h) | 102.99 mph (165.75 km/h) |
| 85 mph (136.79 km/h) | 109.43 mph (176.11 km/h) |
| 90 mph (144.84 km/h) | 115.87 mph (186.47 km/h) |
| 95 mph (152.89 km/h) | 122.3 mph (196.83 km/h) |
| 100 mph (160.93 km/h) | 128.74 mph (207.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3847 | 4471 |
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