About chedech gear ratio

chedech is 5 gears model.
Chainring teeth: 46T
Casette= Sturmey Archer SRF5(w) 5-speed internal hub
(Sprocket teeth= 13T).

Gear Ratio:
• Gear 1 – 62.5%
• Gear 2 – 75%
• Gear 3 – 100%
• Gear 4 – 133.3%
• Gear 5 – 160%