Will 18x9.5 + 20 be teh same as 17x9+10??

[AN89HATCH]

I need to get spacers for the rear of my car. My fronts have a 25mm spacer brininging the front to a 17x9+10. I can not decide what spacer to ge for my rear wheels which are 18x9.5+ 35. Should I go with a 15mm spacer to bring the offset to 18x9.5+ 20? or should I go with a 20mm spacer bringing the rear to a 18x9.5+ 15? I am trying to get the rear wheels as flush, or to stick out a little more than the fronts thanks.

[sw20>>s14]

how could they possibly be the same? for a 9.5 +20's outer rim to be the "same" for a 9" rim, the offset would have to be +14...

and for a 9" +10's outer rim to be the "same" for a 9.5's outer rim, the offset would have to be +16

[AN89HATCH]

how could they possibly be the same? for a 9.5 +20's outer rim to be the "same" for a 9" rim, the offset would have to be +14...

and for a 9" +10's outer rim to be the "same" for a 9.5's outer rim, the offset would have to be +16

Ok let me try this again up front I have a 17x9 +10 wheel. It stick out past the fender maby 5mm My rear is a 18x9.5+ 35, and it is sunken in prob by 2 mm. I am trying to get my rear wheels even or to stick out past my front wheels. The way my car is now my fronts are flush, and my rears are not as flush as the fronts, and it looks bad. I am wondering will a 15mm spacer be enough for the rear, or should I go with a 20mm spacer for the rear? But i think you answerd my question. the rear offset will have to be a +16.

[gotta240]

isn't 1 inch like 25mm?

[SoSideways]

1" = 25.4mm

.5" = 12.7mm

[Nizzan4u2nv]

yes 9 +10 = 9.5 +16. So to go from 9.5 +35 to +16 youd need a 19mm spacer. So a 20mm spacer should do.

Use this for reference:
http://www.1010tires.com/WheelOffsetCalculator.asp