Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/30-21 | 255/35-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.26 (692.4) | 28.03 (711.9) | 0.77 (19.5) 2.8% |
| Width inches (mm) | 10.43 (265) | 10.04 (255) | -0.39 (-10) -3.8% |
| Circum. inches (mm) | 85.64 (2175.24) | 88.05 (2236.5) | 2.41 (61.26) 2.8% |
| Sidewall Height inches (mm) | 3.13 (79.5) | 3.51 (89.25) | 0.38 (9.75) 12.3% |
| Revolutions per mile (km) | 739.85 (459.72) | 719.58 (447.13) | -20.27 (-12.59) -2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.56 mph (33.09 km/h) |
| 25 mph (40.23 km/h) | 25.7 mph (41.37 km/h) |
| 30 mph (48.28 km/h) | 30.84 mph (49.64 km/h) |
| 35 mph (56.33 km/h) | 35.99 mph (57.91 km/h) |
| 40 mph (64.37 km/h) | 41.13 mph (66.19 km/h) |
| 45 mph (72.42 km/h) | 46.27 mph (74.46 km/h) |
| 50 mph (80.47 km/h) | 51.41 mph (82.73 km/h) |
| 55 mph (88.51 km/h) | 56.55 mph (91.01 km/h) |
| 60 mph (96.56 km/h) | 61.69 mph (99.28 km/h) |
| 65 mph (104.61 km/h) | 66.83 mph (107.55 km/h) |
| 70 mph (112.65 km/h) | 71.97 mph (115.83 km/h) |
| 75 mph (120.7 km/h) | 77.11 mph (124.1 km/h) |
| 80 mph (128.75 km/h) | 82.25 mph (132.37 km/h) |
| 85 mph (136.79 km/h) | 87.39 mph (140.65 km/h) |
| 90 mph (144.84 km/h) | 92.53 mph (148.92 km/h) |
| 95 mph (152.89 km/h) | 97.68 mph (157.19 km/h) |
| 100 mph (160.93 km/h) | 102.82 mph (165.47 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1831 | 2127 | 2291 | 2392 | 2501 | 2579 | 2665 | 2766 | 2907 | 3047 | 3203 | 3327 | 3553 | 3803 | 3997 | 4122 | 4192 | 4449 | 4808 | 5587 |
Better Fuel Economy Factory Ratios Increased Power
