Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 345/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 30.51 (774.9) | 2.52 (64) 9% |
| Width inches (mm) | 13.98 (355) | 13.58 (345) | -0.39 (-10) -2.8% |
| Circum. inches (mm) | 87.93 (2233.36) | 95.84 (2434.42) | 7.92 (201.06) 9% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.75 (120.75) | 1.26 (32) 36.1% |
| Revolutions per mile (km) | 720.59 (447.76) | 661.08 (410.77) | -59.51 (-36.98) -8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.86 km/h) |
| 30 mph (48.28 km/h) | 32.7 mph (52.63 km/h) |
| 35 mph (56.33 km/h) | 38.15 mph (61.4 km/h) |
| 40 mph (64.37 km/h) | 43.6 mph (70.17 km/h) |
| 45 mph (72.42 km/h) | 49.05 mph (78.94 km/h) |
| 50 mph (80.47 km/h) | 54.5 mph (87.71 km/h) |
| 55 mph (88.51 km/h) | 59.95 mph (96.48 km/h) |
| 60 mph (96.56 km/h) | 65.4 mph (105.25 km/h) |
| 65 mph (104.61 km/h) | 70.85 mph (114.03 km/h) |
| 70 mph (112.65 km/h) | 76.3 mph (122.8 km/h) |
| 75 mph (120.7 km/h) | 81.75 mph (131.57 km/h) |
| 80 mph (128.75 km/h) | 87.2 mph (140.34 km/h) |
| 85 mph (136.79 km/h) | 92.65 mph (149.11 km/h) |
| 90 mph (144.84 km/h) | 98.1 mph (157.88 km/h) |
| 95 mph (152.89 km/h) | 103.55 mph (166.65 km/h) |
| 100 mph (160.93 km/h) | 109 mph (175.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1682 | 1954 | 2105 | 2198 | 2298 | 2370 | 2448 | 2541 | 2670 | 2799 | 2942 | 3057 | 3264 | 3493 | 3672 | 3787 | 3851 | 4088 | 4417 | 5133 |
Better Fuel Economy Factory Ratios Increased Power
