Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 305/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 28.41 (721.5) | 0.42 (10.6) 1.5% |
| Width inches (mm) | 13.98 (355) | 12.01 (305) | -1.97 (-50) -14.1% |
| Circum. inches (mm) | 87.93 (2233.36) | 89.24 (2266.66) | 1.31 (33.3) 1.5% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.2 (106.75) | 0.71 (18) 20.3% |
| Revolutions per mile (km) | 720.59 (447.76) | 710.01 (441.18) | -10.59 (-6.58) -1.5% |
305/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.67 km/h) |
| 25 mph (40.23 km/h) | 25.37 mph (40.83 km/h) |
| 30 mph (48.28 km/h) | 30.45 mph (49 km/h) |
| 35 mph (56.33 km/h) | 35.52 mph (57.17 km/h) |
| 40 mph (64.37 km/h) | 40.6 mph (65.33 km/h) |
| 45 mph (72.42 km/h) | 45.67 mph (73.5 km/h) |
| 50 mph (80.47 km/h) | 50.75 mph (81.67 km/h) |
| 55 mph (88.51 km/h) | 55.82 mph (89.83 km/h) |
| 60 mph (96.56 km/h) | 60.89 mph (98 km/h) |
| 65 mph (104.61 km/h) | 65.97 mph (106.17 km/h) |
| 70 mph (112.65 km/h) | 71.04 mph (114.33 km/h) |
| 75 mph (120.7 km/h) | 76.12 mph (122.5 km/h) |
| 80 mph (128.75 km/h) | 81.19 mph (130.67 km/h) |
| 85 mph (136.79 km/h) | 86.27 mph (138.83 km/h) |
| 90 mph (144.84 km/h) | 91.34 mph (147 km/h) |
| 95 mph (152.89 km/h) | 96.42 mph (155.17 km/h) |
| 100 mph (160.93 km/h) | 101.49 mph (163.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1807 | 2099 | 2260 | 2360 | 2468 | 2545 | 2630 | 2729 | 2868 | 3006 | 3160 | 3283 | 3506 | 3752 | 3944 | 4067 | 4136 | 4390 | 4744 | 5513 |
Better Fuel Economy Factory Ratios Increased Power
