66ckurt

i am about to buy a set of 17 " TT2s and everyones says u need 4.75 backspacing for them to fit what does this mean im guessing it can be spacers because they are measured in inchs and 4and 3/4 inchs is massive.
thanks
kurtis

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speed does not kill, instant stops... thats what will get ya.

DARKON

It means that there needs to be 4 3/4" space between where the lugs connect to the inside (back) of the wheel.

Backspacing is normally a function of the wheel's fabrication. However, spacers can be used to compensate.

66ckurt

oh so its basically the thickness of the center of the rim were the bolts connect to?

__________________
speed does not kill, instant stops... thats what will get ya.

Markstang1969

No the distance from the back to the hub. Different wheels have different "offsets". How "deep" in the wheel the hub center is.

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1969 Mustang Grande coupe - 302, auto C4. Sold April 2007 :-(

66ckurt

so i need a positive 4.75 for my 17*8 ?

__________________
speed does not kill, instant stops... thats what will get ya.

Markstang1969

Backspace is measured from the back of the wheel.

Offset is measured from the center:

This page may explain better:

http://www.rsracing.com/tech-wheel.html

__________________
1969 Mustang Grande coupe - 302, auto C4. Sold April 2007 :-(

66ckurt

i got it now thnx for your help

__________________
speed does not kill, instant stops... thats what will get ya.

Markstang1969

YW

__________________
1969 Mustang Grande coupe - 302, auto C4. Sold April 2007 :-(