Outer Limits 4x4 Board

ok what ratio should i be running if i want to run 35-37" muddies been thinking mabee some 36" centrepedes or jungle trekers powered by a 4.5 petrol. also im getting some air lockers how do these work do they include the centre in them. what im getting at is can i change my ratios by buying a loker with a certain ratio or do i have to change that seperatly, excuse my limited knoledge. thanks guys.

Dep on how much on road and off, anywhere from 4.3, 4,625 or 4.88.

If 35's go the 4.3. If lots of offroad and 37's, go 4.88, although it will drink a bit on the hwy.