Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/25-21 | 285/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.81 (680.9) | 27.73 (704.4) | 0.93 (23.5) 3.5% |
| Width inches (mm) | 11.61 (295) | 11.22 (285) | -0.39 (-10) -3.4% |
| Circum. inches (mm) | 84.22 (2139.11) | 87.12 (2212.94) | 2.91 (73.83) 3.5% |
| Sidewall Height inches (mm) | 2.9 (73.75) | 3.37 (85.5) | 0.46 (11.75) 15.9% |
| Revolutions per mile (km) | 752.34 (467.48) | 727.24 (451.89) | -25.1 (-15.6) -3.3% |
285/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.69 mph (33.3 km/h) |
| 25 mph (40.23 km/h) | 25.86 mph (41.62 km/h) |
| 30 mph (48.28 km/h) | 31.04 mph (49.95 km/h) |
| 35 mph (56.33 km/h) | 36.21 mph (58.27 km/h) |
| 40 mph (64.37 km/h) | 41.38 mph (66.6 km/h) |
| 45 mph (72.42 km/h) | 46.55 mph (74.92 km/h) |
| 50 mph (80.47 km/h) | 51.73 mph (83.24 km/h) |
| 55 mph (88.51 km/h) | 56.9 mph (91.57 km/h) |
| 60 mph (96.56 km/h) | 62.07 mph (99.89 km/h) |
| 65 mph (104.61 km/h) | 67.24 mph (108.22 km/h) |
| 70 mph (112.65 km/h) | 72.42 mph (116.54 km/h) |
| 75 mph (120.7 km/h) | 77.59 mph (124.87 km/h) |
| 80 mph (128.75 km/h) | 82.76 mph (133.19 km/h) |
| 85 mph (136.79 km/h) | 87.93 mph (141.52 km/h) |
| 90 mph (144.84 km/h) | 93.11 mph (149.84 km/h) |
| 95 mph (152.89 km/h) | 98.28 mph (158.16 km/h) |
| 100 mph (160.93 km/h) | 103.45 mph (166.49 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1851 | 2150 | 2315 | 2418 | 2528 | 2607 | 2693 | 2796 | 2937 | 3079 | 3237 | 3363 | 3591 | 3843 | 4040 | 4166 | 4237 | 4497 | 4859 | 5647 |
Better Fuel Economy Factory Ratios Increased Power
