Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-21 | 300/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.58 (725.9) | 29.27 (743.4) | 0.69 (17.5) 2.4% |
| Width inches (mm) | 10.83 (275) | 11.81 (300) | 0.98 (25) 9.1% |
| Circum. inches (mm) | 89.78 (2280.48) | 91.95 (2335.46) | 2.16 (54.98) 2.4% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.13 (105) | 0.34 (8.75) 9.1% |
| Revolutions per mile (km) | 705.7 (438.5) | 689.09 (428.18) | -16.61 (-10.32) -2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.48 mph (32.96 km/h) |
| 25 mph (40.23 km/h) | 25.6 mph (41.2 km/h) |
| 30 mph (48.28 km/h) | 30.72 mph (49.44 km/h) |
| 35 mph (56.33 km/h) | 35.84 mph (57.69 km/h) |
| 40 mph (64.37 km/h) | 40.96 mph (65.93 km/h) |
| 45 mph (72.42 km/h) | 46.08 mph (74.17 km/h) |
| 50 mph (80.47 km/h) | 51.21 mph (82.41 km/h) |
| 55 mph (88.51 km/h) | 56.33 mph (90.65 km/h) |
| 60 mph (96.56 km/h) | 61.45 mph (98.89 km/h) |
| 65 mph (104.61 km/h) | 66.57 mph (107.13 km/h) |
| 70 mph (112.65 km/h) | 71.69 mph (115.37 km/h) |
| 75 mph (120.7 km/h) | 76.81 mph (123.61 km/h) |
| 80 mph (128.75 km/h) | 81.93 mph (131.85 km/h) |
| 85 mph (136.79 km/h) | 87.05 mph (140.09 km/h) |
| 90 mph (144.84 km/h) | 92.17 mph (148.33 km/h) |
| 95 mph (152.89 km/h) | 97.29 mph (156.57 km/h) |
| 100 mph (160.93 km/h) | 102.41 mph (164.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1754 | 2037 | 2194 | 2291 | 2395 | 2470 | 2552 | 2649 | 2783 | 2918 | 3067 | 3186 | 3403 | 3642 | 3828 | 3947 | 4015 | 4261 | 4604 | 5350 |
Better Fuel Economy Factory Ratios Increased Power
