Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/85-15 | 33/12.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.73 (780.5) | 33.03 (838.92) | 2.3 (58.42) 7.5% |
| Width inches (mm) | 9.25 (235) | 12.52 (318) | 3.27 (83) 35.3% |
| Circum. inches (mm) | 96.54 (2452.01) | 103.76 (2635.54) | 7.23 (183.53) 7.5% |
| Sidewall Height inches (mm) | 7.86 (199.75) | 9.01 (228.96) | 1.15 (29.21) 14.6% |
| Revolutions per mile (km) | 656.34 (407.83) | 610.63 (379.43) | -45.71 (-28.4) -7% |
33/12.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.6 km/h) |
| 25 mph (40.23 km/h) | 26.87 mph (43.25 km/h) |
| 30 mph (48.28 km/h) | 32.25 mph (51.89 km/h) |
| 35 mph (56.33 km/h) | 37.62 mph (60.54 km/h) |
| 40 mph (64.37 km/h) | 42.99 mph (69.19 km/h) |
| 45 mph (72.42 km/h) | 48.37 mph (77.84 km/h) |
| 50 mph (80.47 km/h) | 53.74 mph (86.49 km/h) |
| 55 mph (88.51 km/h) | 59.12 mph (95.14 km/h) |
| 60 mph (96.56 km/h) | 64.49 mph (103.79 km/h) |
| 65 mph (104.61 km/h) | 69.87 mph (112.44 km/h) |
| 70 mph (112.65 km/h) | 75.24 mph (121.09 km/h) |
| 75 mph (120.7 km/h) | 80.61 mph (129.74 km/h) |
| 80 mph (128.75 km/h) | 85.99 mph (138.38 km/h) |
| 85 mph (136.79 km/h) | 91.36 mph (147.03 km/h) |
| 90 mph (144.84 km/h) | 96.74 mph (155.68 km/h) |
| 95 mph (152.89 km/h) | 102.11 mph (164.33 km/h) |
| 100 mph (160.93 km/h) | 107.48 mph (172.98 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
