Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/35-21 | 325/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.13 (739.9) | 28.68 (728.4) | -0.45 (-11.5) -1.6% |
| Width inches (mm) | 11.61 (295) | 12.8 (325) | 1.18 (30) 10.2% |
| Circum. inches (mm) | 91.51 (2324.46) | 90.09 (2288.34) | -1.42 (-36.13) -1.6% |
| Sidewall Height inches (mm) | 4.06 (103.25) | 3.84 (97.5) | -0.23 (-5.75) -5.6% |
| Revolutions per mile (km) | 692.35 (430.21) | 703.28 (437) | 10.93 (6.79) 1.6% |
325/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.69 mph (31.69 km/h) |
| 25 mph (40.23 km/h) | 24.61 mph (39.61 km/h) |
| 30 mph (48.28 km/h) | 29.53 mph (47.53 km/h) |
| 35 mph (56.33 km/h) | 34.46 mph (55.45 km/h) |
| 40 mph (64.37 km/h) | 39.38 mph (63.37 km/h) |
| 45 mph (72.42 km/h) | 44.3 mph (71.3 km/h) |
| 50 mph (80.47 km/h) | 49.22 mph (79.22 km/h) |
| 55 mph (88.51 km/h) | 54.15 mph (87.14 km/h) |
| 60 mph (96.56 km/h) | 59.07 mph (95.06 km/h) |
| 65 mph (104.61 km/h) | 63.99 mph (102.98 km/h) |
| 70 mph (112.65 km/h) | 68.91 mph (110.9 km/h) |
| 75 mph (120.7 km/h) | 73.83 mph (118.83 km/h) |
| 80 mph (128.75 km/h) | 78.76 mph (126.75 km/h) |
| 85 mph (136.79 km/h) | 83.68 mph (134.67 km/h) |
| 90 mph (144.84 km/h) | 88.6 mph (142.59 km/h) |
| 95 mph (152.89 km/h) | 93.52 mph (150.51 km/h) |
| 100 mph (160.93 km/h) | 98.45 mph (158.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1790 | 2079 | 2239 | 2338 | 2445 | 2521 | 2605 | 2704 | 2841 | 2978 | 3130 | 3252 | 3473 | 3717 | 3907 | 4029 | 4097 | 4349 | 4699 | 5461 |
Better Fuel Economy Factory Ratios Increased Power
