i have 20x10 in the rear (et+25). I'm thinking about going with a 10mm spacer. I'm lowered on Tanabe GF210's. You guys think I would have to roll my fenders or will I be o.k?

 

Why do you need a spacer? What size tires are you planning on running? 275 will fit for sure, 285 could rub depending on which tire you get and anything larger than that will require a roll.

 

that's plenty wide, no need for a spacer...

Odds are you will have to roll your fenders when drop the Z... How much of a drop?

 

For the cost of rolling the fenders, it's easier to just go ahead and do it. This way you wont have to worry about when you do drop it and put spacers on it.

Even when I drive hard with 19x10 and 285 tires it rubs a little. I have the Eibach prokit with 28 offset. I'm about to roll mine and go with a 10mm spacer.

 

20x10 must be huge. recommended that you roll.

 

The 20" part of the wheel is not the problem. It depends on the size of the tire being used.

 

the size of the rear tire is a Falken 452 sized 285/30. the current wheel has an offset of +25, but I when I looked at the 5mm spacers I ordered, they were like the thickness of a nickel