method roost

Hello Buddy's,

I'm falling in love of this model but how to choose the right offset

https://www.methodracewheels.com/collections/street-wheels/products/roost-matte-black

18" and 3" lift with torsion key
Bf Goodrich tire all terrain

My tire do not get out of the body cladding, is not allowed in Belgium

Fender flare is a solution but I ve never find for body cladded or on this pics but I don't know where find them

http://tuningsuv.com/displayimage-8-898.html

Thank you all 

Yes I needed them In NJ.
Bushwhacker 4"