Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-20 | 33/13.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.91 (810.5) | 33.1 (840.62) | 1.19 (30.12) 3.7% |
| Width inches (mm) | 10.83 (275) | 13.5 (343) | 2.68 (68) 24.7% |
| Circum. inches (mm) | 100.25 (2546.26) | 103.97 (2640.89) | 3.73 (94.62) 3.7% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 9.05 (229.81) | 3.09 (78.56) 51.9% |
| Revolutions per mile (km) | 632.04 (392.73) | 609.4 (378.66) | -22.65 (-14.07) -3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.38 km/h) |
| 25 mph (40.23 km/h) | 25.93 mph (41.73 km/h) |
| 30 mph (48.28 km/h) | 31.11 mph (50.07 km/h) |
| 35 mph (56.33 km/h) | 36.3 mph (58.42 km/h) |
| 40 mph (64.37 km/h) | 41.49 mph (66.77 km/h) |
| 45 mph (72.42 km/h) | 46.67 mph (75.11 km/h) |
| 50 mph (80.47 km/h) | 51.86 mph (83.46 km/h) |
| 55 mph (88.51 km/h) | 57.04 mph (91.8 km/h) |
| 60 mph (96.56 km/h) | 62.23 mph (100.15 km/h) |
| 65 mph (104.61 km/h) | 67.42 mph (108.5 km/h) |
| 70 mph (112.65 km/h) | 72.6 mph (116.84 km/h) |
| 75 mph (120.7 km/h) | 77.79 mph (125.19 km/h) |
| 80 mph (128.75 km/h) | 82.97 mph (133.53 km/h) |
| 85 mph (136.79 km/h) | 88.16 mph (141.88 km/h) |
| 90 mph (144.84 km/h) | 93.34 mph (150.22 km/h) |
| 95 mph (152.89 km/h) | 98.53 mph (158.57 km/h) |
| 100 mph (160.93 km/h) | 103.72 mph (166.92 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1551 | 1802 | 1940 | 2026 | 2118 | 2184 | 2257 | 2343 | 2461 | 2580 | 2712 | 2818 | 3009 | 3220 | 3385 | 3491 | 3550 | 3768 | 4072 | 4732 |
Better Fuel Economy Factory Ratios Increased Power
