Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-21 | 355/25-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27 (685.9) | 27.99 (710.9) | 0.98 (25) 3.6% |
| Width inches (mm) | 12.01 (305) | 13.98 (355) | 1.97 (50) 16.4% |
| Circum. inches (mm) | 84.84 (2154.82) | 87.93 (2233.36) | 3.09 (78.54) 3.6% |
| Sidewall Height inches (mm) | 3 (76.25) | 3.49 (88.75) | 0.49 (12.5) 16.4% |
| Revolutions per mile (km) | 746.86 (464.08) | 720.59 (447.76) | -26.26 (-16.32) -3.5% |
355/25-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.73 mph (33.36 km/h) |
| 25 mph (40.23 km/h) | 25.91 mph (41.7 km/h) |
| 30 mph (48.28 km/h) | 31.09 mph (50.04 km/h) |
| 35 mph (56.33 km/h) | 36.28 mph (58.38 km/h) |
| 40 mph (64.37 km/h) | 41.46 mph (66.72 km/h) |
| 45 mph (72.42 km/h) | 46.64 mph (75.06 km/h) |
| 50 mph (80.47 km/h) | 51.82 mph (83.4 km/h) |
| 55 mph (88.51 km/h) | 57 mph (91.74 km/h) |
| 60 mph (96.56 km/h) | 62.19 mph (100.08 km/h) |
| 65 mph (104.61 km/h) | 67.37 mph (108.42 km/h) |
| 70 mph (112.65 km/h) | 72.55 mph (116.76 km/h) |
| 75 mph (120.7 km/h) | 77.73 mph (125.1 km/h) |
| 80 mph (128.75 km/h) | 82.92 mph (133.44 km/h) |
| 85 mph (136.79 km/h) | 88.1 mph (141.78 km/h) |
| 90 mph (144.84 km/h) | 93.28 mph (150.12 km/h) |
| 95 mph (152.89 km/h) | 98.46 mph (158.46 km/h) |
| 100 mph (160.93 km/h) | 103.64 mph (166.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1834 | 2130 | 2294 | 2396 | 2505 | 2583 | 2669 | 2770 | 2911 | 3051 | 3207 | 3332 | 3558 | 3808 | 4003 | 4128 | 4198 | 4456 | 4815 | 5595 |
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