Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/75-20 | 35/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.01 (965.5) | 35.03 (889.8) | -2.98 (-75.7) -7.8% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 119.42 (3033.21) | 110.05 (2795.39) | -9.36 (-237.82) -7.8% |
| Sidewall Height inches (mm) | 9.01 (228.75) | 10.02 (254.4) | 1.01 (25.65) 11.2% |
| Revolutions per mile (km) | 530.57 (329.68) | 575.71 (357.73) | 45.14 (28.05) 8.5% |
35/12.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.43 mph (29.66 km/h) |
| 25 mph (40.23 km/h) | 23.04 mph (37.08 km/h) |
| 30 mph (48.28 km/h) | 27.65 mph (44.49 km/h) |
| 35 mph (56.33 km/h) | 32.26 mph (51.91 km/h) |
| 40 mph (64.37 km/h) | 36.86 mph (59.33 km/h) |
| 45 mph (72.42 km/h) | 41.47 mph (66.74 km/h) |
| 50 mph (80.47 km/h) | 46.08 mph (74.16 km/h) |
| 55 mph (88.51 km/h) | 50.69 mph (81.57 km/h) |
| 60 mph (96.56 km/h) | 55.3 mph (88.99 km/h) |
| 65 mph (104.61 km/h) | 59.9 mph (96.41 km/h) |
| 70 mph (112.65 km/h) | 64.51 mph (103.82 km/h) |
| 75 mph (120.7 km/h) | 69.12 mph (111.24 km/h) |
| 80 mph (128.75 km/h) | 73.73 mph (118.65 km/h) |
| 85 mph (136.79 km/h) | 78.34 mph (126.07 km/h) |
| 90 mph (144.84 km/h) | 82.94 mph (133.48 km/h) |
| 95 mph (152.89 km/h) | 87.55 mph (140.9 km/h) |
| 100 mph (160.93 km/h) | 92.16 mph (148.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2001 | 2064 | 2132 | 2213 | 2325 | 2438 | 2562 | 2662 | 2843 | 3042 | 3198 | 3298 | 3354 | 3560 | 3847 | 4470 |
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