Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/30-21 | 295/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.02 (686.4) | 27.97 (710.4) | 0.94 (24) 3.5% |
| Width inches (mm) | 10.04 (255) | 11.61 (295) | 1.57 (40) 15.7% |
| Circum. inches (mm) | 84.9 (2156.39) | 87.87 (2231.79) | 2.97 (75.4) 3.5% |
| Sidewall Height inches (mm) | 3.01 (76.5) | 3.48 (88.5) | 0.47 (12) 15.7% |
| Revolutions per mile (km) | 746.31 (463.74) | 721.1 (448.07) | -25.21 (-15.67) -3.4% |
295/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.31 km/h) |
| 25 mph (40.23 km/h) | 25.87 mph (41.64 km/h) |
| 30 mph (48.28 km/h) | 31.05 mph (49.97 km/h) |
| 35 mph (56.33 km/h) | 36.22 mph (58.3 km/h) |
| 40 mph (64.37 km/h) | 41.4 mph (66.62 km/h) |
| 45 mph (72.42 km/h) | 46.57 mph (74.95 km/h) |
| 50 mph (80.47 km/h) | 51.75 mph (83.28 km/h) |
| 55 mph (88.51 km/h) | 56.92 mph (91.61 km/h) |
| 60 mph (96.56 km/h) | 62.1 mph (99.94 km/h) |
| 65 mph (104.61 km/h) | 67.27 mph (108.27 km/h) |
| 70 mph (112.65 km/h) | 72.45 mph (116.59 km/h) |
| 75 mph (120.7 km/h) | 77.62 mph (124.92 km/h) |
| 80 mph (128.75 km/h) | 82.8 mph (133.25 km/h) |
| 85 mph (136.79 km/h) | 87.97 mph (141.58 km/h) |
| 90 mph (144.84 km/h) | 93.15 mph (149.91 km/h) |
| 95 mph (152.89 km/h) | 98.32 mph (158.23 km/h) |
| 100 mph (160.93 km/h) | 103.5 mph (166.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1835 | 2132 | 2296 | 2397 | 2507 | 2585 | 2671 | 2772 | 2913 | 3053 | 3209 | 3334 | 3561 | 3811 | 4006 | 4131 | 4201 | 4459 | 4818 | 5599 |
Better Fuel Economy Factory Ratios Increased Power
