Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 365/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 27.19 (690.5) | -0.8 (-20.4) -2.9% |
| Width inches (mm) | 13.98 (355) | 14.37 (365) | 0.39 (10) 2.8% |
| Circum. inches (mm) | 87.93 (2233.36) | 85.4 (2169.27) | -2.52 (-64.09) -2.9% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 3.59 (91.25) | 0.1 (2.5) 2.8% |
| Revolutions per mile (km) | 720.59 (447.76) | 741.88 (460.98) | 21.29 (13.23) 3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.26 km/h) |
| 25 mph (40.23 km/h) | 24.28 mph (39.08 km/h) |
| 30 mph (48.28 km/h) | 29.14 mph (46.89 km/h) |
| 35 mph (56.33 km/h) | 34 mph (54.71 km/h) |
| 40 mph (64.37 km/h) | 38.85 mph (62.53 km/h) |
| 45 mph (72.42 km/h) | 43.71 mph (70.34 km/h) |
| 50 mph (80.47 km/h) | 48.57 mph (78.16 km/h) |
| 55 mph (88.51 km/h) | 53.42 mph (85.97 km/h) |
| 60 mph (96.56 km/h) | 58.28 mph (93.79 km/h) |
| 65 mph (104.61 km/h) | 63.13 mph (101.61 km/h) |
| 70 mph (112.65 km/h) | 67.99 mph (109.42 km/h) |
| 75 mph (120.7 km/h) | 72.85 mph (117.24 km/h) |
| 80 mph (128.75 km/h) | 77.7 mph (125.05 km/h) |
| 85 mph (136.79 km/h) | 82.56 mph (132.87 km/h) |
| 90 mph (144.84 km/h) | 87.42 mph (140.68 km/h) |
| 95 mph (152.89 km/h) | 92.27 mph (148.5 km/h) |
| 100 mph (160.93 km/h) | 97.13 mph (156.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1888 | 2193 | 2362 | 2466 | 2579 | 2659 | 2748 | 2852 | 2997 | 3141 | 3302 | 3430 | 3663 | 3921 | 4121 | 4250 | 4322 | 4587 | 4957 | 5760 |
Better Fuel Economy Factory Ratios Increased Power
