Converse of object

• change: Prior to replacement I consider the possibility of changing the gear ratios: could you use a higher gear?

• need: If you need a lower gear ratio the hub allows you to fit a larger rear sprocket, and vise versa.

Adjective modifier

• 4th: If the 4th gear ratio is too low ( high number ) then it will limit the speed the scooter can achieve.

• low: If you need a lower gear ratio the hub allows you to fit a larger rear sprocket, and vise versa.