i got original rs 001's. If I put 1.5 lips on it, it turns into 7.5 Width and what offset?

im not too familiar w. the diff rs models( iirc my old rs001's were +25) but i do know that if you add an inch of lip the offset (in most cases) will go down about 12mm. if you add .5" it will go down approx 6mm.

so if u had 15x7 +25 rs001 n u added .5" of more lip(7.5j) you will be down to approx +19 offset

so if u had a wheel w/ a +25 mm offset n 4" lip and u replaced the lip with a 5" lip your new offset should be approx +12mm.

so by adding .5 of lip u take away about 6mm

by adding an inch u take away about 12mm

ya mine are +25. so its minus 6.
im planning on running 2in in the back and 1.5in the front.

so end result would be this, correct me if im wrong.
7.5/+19 FRONT
8/+13 REAR

sounds about right to me

ya your right. GL

thanks guys