Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/35-21 | 265/30-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.75 (704.9) | 27.26 (692.4) | -0.49 (-12.5) -1.8% |
| Width inches (mm) | 9.65 (245) | 10.43 (265) | 0.79 (20) 8.2% |
| Circum. inches (mm) | 87.19 (2214.51) | 85.64 (2175.24) | -1.55 (-39.27) -1.8% |
| Sidewall Height inches (mm) | 3.38 (85.75) | 3.13 (79.5) | -0.25 (-6.25) -7.3% |
| Revolutions per mile (km) | 726.73 (451.57) | 739.85 (459.72) | 13.12 (8.15) 1.8% |
265/30-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.62 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.52 km/h) |
| 30 mph (48.28 km/h) | 29.47 mph (47.42 km/h) |
| 35 mph (56.33 km/h) | 34.38 mph (55.33 km/h) |
| 40 mph (64.37 km/h) | 39.29 mph (63.23 km/h) |
| 45 mph (72.42 km/h) | 44.2 mph (71.14 km/h) |
| 50 mph (80.47 km/h) | 49.11 mph (79.04 km/h) |
| 55 mph (88.51 km/h) | 54.02 mph (86.94 km/h) |
| 60 mph (96.56 km/h) | 58.94 mph (94.85 km/h) |
| 65 mph (104.61 km/h) | 63.85 mph (102.75 km/h) |
| 70 mph (112.65 km/h) | 68.76 mph (110.66 km/h) |
| 75 mph (120.7 km/h) | 73.67 mph (118.56 km/h) |
| 80 mph (128.75 km/h) | 78.58 mph (126.46 km/h) |
| 85 mph (136.79 km/h) | 83.49 mph (134.37 km/h) |
| 90 mph (144.84 km/h) | 88.4 mph (142.27 km/h) |
| 95 mph (152.89 km/h) | 93.32 mph (150.18 km/h) |
| 100 mph (160.93 km/h) | 98.23 mph (158.08 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
