Old skool wheel, need help guessing offset ???

[9ine Deuce]

this is a 17x9.5 off an NSX, i know the lip is weak but could some of our resident offset specialists take a guess at what ET ?? im thinkin 45 offset, but i could be wrong.

http://loveforjesus.com/brianftp/pictures/wheels/IMG_0224.JPG

http://loveforjesus.com/brianftp/pictures/wheels/IMG_0233.JPG

a measurment of 3.2" was taken with this method

http://loveforjesus.com/brianftp/pictures/wheels/IMG_0235.JPG

[chrisngo]

Easiest method is to get a straight edge and find out where the center point of the wheel is. We can approximate this as 4.75" (9.5" / 2) or...roughly 100mm (double check this). Second you find out where the hub lies with respect to the ring of the rim. Ummm....place your straight edge against the part of the wheel that touches the rotor and note where this lies with respect to the ring. Then do the subtraction and you should have your offset.

My guess is that it is in it's 40's.

Chris

[9ine Deuce]

is it possibble that the wheel isnt 9.5" maybe 9" or less ?

thanks for the tip on measuring offset, im gonna see if i can get this guy to measure up.

[OnTop]

even if the label is missing from the wheel, there sould be some sort of stamping on the backside of the centers. can you post any pics of stamping.


see just above your finger? that should tell you everything you need to know

http://img.photobucket.com/albums/v418/ontop/stampin.jpg

[9ine Deuce]

this is the only pic i have of the stamp, what you are refering to is the "made in japan" logo. these wheels are also not in my posession.

http://loveforjesus.com/brianftp/pictures/wheels/IMG_0219.JPG

[Birdy]

find the center of the wheel and then where the wheel meets the hub and measure the distance between the 2 in mm.

[OnTop]

hmm well you got me there.

[SoCalSC4]

All you have to know are:

1) Width of the wheel. Might be stamped on the wheel, or you can measure bead set-to-bead seat.
Or, you can measure the overall width of the wheel amd subtract 1" (wheels are always measured from inside the bead to inside the opposite bead, therefore a 9.5" wide wheel will really measure 10.5" OVERALL (outside to outside).
2) the wheels' backspacing. Lay the wheel flat on it's face and measure from the innermost portion of the rim straight down to the backpad (aka mounting surface) of the wheel. You might come up with something like 6" or 6.5".

I can reverse-engineer the wheel and tell you the offset if I know these two measurements.

[One Ton VIP]

I wouldn't even bother trying to figure out the offset if I were you. Now you are forced to use the much more accurate fitment measurement: backspacing. And true width and backspacing are the ultimate dimensions to use in order to determine if something will fit or not...