Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 135/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 20.5 (520.8) | -7.48 (-190.1) -26.7% |
| Width inches (mm) | 13.98 (355) | 5.31 (135) | -8.66 (-220) -62% |
| Circum. inches (mm) | 87.93 (2233.36) | 64.42 (1636.14) | -23.51 (-597.22) -26.7% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.25 (108) | 0.76 (19.25) 21.7% |
| Revolutions per mile (km) | 720.59 (447.76) | 983.62 (611.19) | 263.03 (163.44) 36.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 14.65 mph (23.58 km/h) |
| 25 mph (40.23 km/h) | 18.31 mph (29.47 km/h) |
| 30 mph (48.28 km/h) | 21.98 mph (35.37 km/h) |
| 35 mph (56.33 km/h) | 25.64 mph (41.26 km/h) |
| 40 mph (64.37 km/h) | 29.3 mph (47.16 km/h) |
| 45 mph (72.42 km/h) | 32.97 mph (53.05 km/h) |
| 50 mph (80.47 km/h) | 36.63 mph (58.95 km/h) |
| 55 mph (88.51 km/h) | 40.29 mph (64.84 km/h) |
| 60 mph (96.56 km/h) | 43.96 mph (70.74 km/h) |
| 65 mph (104.61 km/h) | 47.62 mph (76.63 km/h) |
| 70 mph (112.65 km/h) | 51.28 mph (82.53 km/h) |
| 75 mph (120.7 km/h) | 54.94 mph (88.42 km/h) |
| 80 mph (128.75 km/h) | 58.61 mph (94.32 km/h) |
| 85 mph (136.79 km/h) | 62.27 mph (100.21 km/h) |
| 90 mph (144.84 km/h) | 65.93 mph (106.11 km/h) |
| 95 mph (152.89 km/h) | 69.6 mph (112 km/h) |
| 100 mph (160.93 km/h) | 73.26 mph (117.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
