Confusion over rear suspension

Fastfatdude

Hi,

Sorry if i am asking dumb qns.

If i see correctly, the rear sus setup is such that the spring and shock is mounted separately from each other, almost side by side. Therefore i assume that if changing to aftermarket, they will be mounted separately as well.

But i keep reading about this "true coilover". Does this mean that this type of aftermarket has the shock sitting inside the spring just like the stock front sus? In such case, it means that where the original rear spring is sitting will be empty space? And will there be additional mods to the whole sus setup to accommodate such "true coilovers?

Finally for example, Zeal sells 2 types of each model. One that is separate (more expensive) and the other that is true-sus (cheaper). Can anyone explain where the price disparity comes from since material used is likely the same right?

Thanks for any help in clearing up my confusion.
Ffd

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