Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/30-21 | 265/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.5 (698.4) | 27.26 (692.4) | -0.24 (-6) -0.9% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 86.38 (2194.09) | 85.64 (2175.24) | -0.74 (-18.85) -0.9% |
| Sidewall Height inches (mm) | 3.25 (82.5) | 3.13 (79.5) | -0.12 (-3) -3.6% |
| Revolutions per mile (km) | 733.49 (455.77) | 739.85 (459.72) | 6.36 (3.95) 0.9% |
265/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.83 mph (31.91 km/h) |
| 25 mph (40.23 km/h) | 24.79 mph (39.89 km/h) |
| 30 mph (48.28 km/h) | 29.74 mph (47.87 km/h) |
| 35 mph (56.33 km/h) | 34.7 mph (55.84 km/h) |
| 40 mph (64.37 km/h) | 39.66 mph (63.82 km/h) |
| 45 mph (72.42 km/h) | 44.61 mph (71.8 km/h) |
| 50 mph (80.47 km/h) | 49.57 mph (79.78 km/h) |
| 55 mph (88.51 km/h) | 54.53 mph (87.75 km/h) |
| 60 mph (96.56 km/h) | 59.48 mph (95.73 km/h) |
| 65 mph (104.61 km/h) | 64.44 mph (103.71 km/h) |
| 70 mph (112.65 km/h) | 69.4 mph (111.69 km/h) |
| 75 mph (120.7 km/h) | 74.36 mph (119.66 km/h) |
| 80 mph (128.75 km/h) | 79.31 mph (127.64 km/h) |
| 85 mph (136.79 km/h) | 84.27 mph (135.62 km/h) |
| 90 mph (144.84 km/h) | 89.23 mph (143.6 km/h) |
| 95 mph (152.89 km/h) | 94.18 mph (151.57 km/h) |
| 100 mph (160.93 km/h) | 99.14 mph (159.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1883 | 2187 | 2355 | 2460 | 2572 | 2652 | 2740 | 2844 | 2988 | 3133 | 3293 | 3421 | 3653 | 3910 | 4110 | 4238 | 4310 | 4575 | 4943 | 5744 |
Better Fuel Economy Factory Ratios Increased Power
