Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-15 | 33/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.83 (808.5) | 33.03 (838.92) | 1.2 (30.42) 3.8% |
| Width inches (mm) | 11.22 (285) | 12.52 (318) | 1.3 (33) 11.6% |
| Circum. inches (mm) | 100 (2539.98) | 103.76 (2635.54) | 3.76 (95.57) 3.8% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 9.01 (228.96) | 0.6 (15.21) 7.1% |
| Revolutions per mile (km) | 633.61 (393.7) | 610.63 (379.43) | -22.98 (-14.28) -3.6% |
33/12.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.75 mph (33.4 km/h) |
| 25 mph (40.23 km/h) | 25.94 mph (41.75 km/h) |
| 30 mph (48.28 km/h) | 31.13 mph (50.1 km/h) |
| 35 mph (56.33 km/h) | 36.32 mph (58.45 km/h) |
| 40 mph (64.37 km/h) | 41.51 mph (66.8 km/h) |
| 45 mph (72.42 km/h) | 46.69 mph (75.15 km/h) |
| 50 mph (80.47 km/h) | 51.88 mph (83.49 km/h) |
| 55 mph (88.51 km/h) | 57.07 mph (91.84 km/h) |
| 60 mph (96.56 km/h) | 62.26 mph (100.19 km/h) |
| 65 mph (104.61 km/h) | 67.45 mph (108.54 km/h) |
| 70 mph (112.65 km/h) | 72.63 mph (116.89 km/h) |
| 75 mph (120.7 km/h) | 77.82 mph (125.24 km/h) |
| 80 mph (128.75 km/h) | 83.01 mph (133.59 km/h) |
| 85 mph (136.79 km/h) | 88.2 mph (141.94 km/h) |
| 90 mph (144.84 km/h) | 93.39 mph (150.29 km/h) |
| 95 mph (152.89 km/h) | 98.57 mph (158.64 km/h) |
| 100 mph (160.93 km/h) | 103.76 mph (166.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1554 | 1805 | 1944 | 2030 | 2123 | 2189 | 2261 | 2347 | 2466 | 2585 | 2718 | 2824 | 3015 | 3227 | 3392 | 3498 | 3558 | 3776 | 4080 | 4741 |
Better Fuel Economy Factory Ratios Increased Power
