5100 Bilstein

im purchasing Bilsteins but I notice people put shims on one side of front. Why is this and do I have to do that?

 

Some trucks lean a little to one side so the owners do it to level the truck laterally. If your truck is level laterally then you don't need the shim.

 

some people also use them to get additional lift height or to get a lift right at 2". the 5100's on the top setting without shims lift 2.28". however, 5100's on the middle setting with shims lift about 2".

 

I added one 1/2 inch shim on each side and set at top setting to have it sit higher after adding 295 70 18 Nitto Ridge grapplers and also added one inch block on rear

 

Thanks everyone I’ll try without a shim first.