Winters Quick Change Gears are constructed from SAE 8620 Steel, Crown Cut, 1-3/8" Wide. 

Specs:

Teeth: 22/33

4.11 Gear Ratio: Low 2.74 High 6.17

4.12 Gear Ratio: Low 2.75 High 6.18

4.57 Gear Ratio: Low 3.05 High 6.86

4.86 Gear Ratio: Low 3.24 High 7.29

To see other gear sets available, check out the Winters Quick Change Gear Chart