wheel calculations, in case you dont know this might help a bit

[poshatch]

for those of you who are looking to get different wheels there are always issues with fitment, coilover clearence, lock rub, fender rub, harness rub, etc...

here is a very easy way to calculate what will fit and what will probably need modifying so i hope this helps (dont know if this exists already if it does go right ahead and delete)

first some real quick conversions:

1" = 25.4 mm6" = 152.4 mm7" = 177.8 mm8" = 203.2 mm9" = 228.6 mm15" = 381 mm16" = 406.4 mm17" = 431.8 mm

alright, now lets get started

stock wheels are: 15"x6" +40 offset

the issues that people run into when getting new wheels can be solved by calculating the INWARD/OUTWARD distance from the hub

to do this you take 1/2 the width and add to it the offset for inner and take away from it for outer

for example, 6"/2 = 76.2 mm + (+40) (offset) is 116.2 mm INWARD and 36.2 mm OUTWARD

now that you know how to calculate this information you can start looking at wheel selections for the car, most problems when choosing a wider wheel can be solved by correcting for the wider wheel by changing the offset, also realizing that their is alot of room for the wheel to go OUTWARD, just a general rule try to keep the INWARD distance close to that of stock specs (116.2 mm)

for those who do not like lower offset, then you might consitter spacers

to factor in spacers you take the spacers width and subtract it from the INWARD and add it to the OUTWARD or basically subtracting the spacer width from the offset

anything lower than a + 40 should fit z32 brakes, and problems start at +0 and (-)

finally, 129.3 mm INWARD is about where i would say clearance starts to end (based upon calculations from grenades 17x9 +15 on a friends car who says he has no issues)

hope this takes away some of the guess work from wheel selection for you all

[nissans13240sx]

Very useful information, thanks.