Is a 20 offset good for a car to be lower 1.25" all around or may I have problems with fenders. I purchased wheels with 35 offset and I planning to install 15mm spacer. What do you guys think?

 

I have a 22 offset but im running on 20inch wheels. If you are running on 20's yes you will rub a bit. If you are running on 19's or lower you will be okay. Also it depends on the width of you wheel but im figuring its not that wide since you got a 35 offset wheel.

 

im running +20 offset with 18x9.5" wheels.
im lowered 1.2/1.0 and im okay.
i would imagine 1.25" would look better and still be fine.

 

OP, what tire size will you be using? 275/35/19 should fit on +20 offset should fit without having to roll fenders (although it may be close), but 285/35/19 will require fender rolling.

 

i have +15 offset all the way around. lowered on eibach sportlines. no fender issues

 

Thanks, Im in 18"s... 8.5" front and 9.5 rear. Front tire is 245/40/18 and rear 275/35/18. As I see no problem with that, Im ok?

 

you will be fine. at the most (and only on some cars) you might need to roll the rear fenders (and get an alignment to correct the extra camber you will get), but your fronts will be fine.

I had a more aggressive setup than you (and much, much lower) and have no fitment issues. you will be fine.