Gnx wheels

[jk kelly]

Why does my 87 which has gnx wheels have a spacer on the rear ? Tire size is 255/50/16 is this normal?

 

[pacecarta]

because they arent GNx rims , they are GTAs
and how much of a spacer?


GTA rims were designed for an F body firebird and are backspaced and stamped (on back) accordingly ' front only' or 'rear only'
front gtas have a different backspace than rear gta rims
with 255/50 mt radials and GTA fronts mounted at rear on a gbody they may need a thin 1/8" spacer , really depends on if axle is centered and alum or steel drums
with rear gtas mounted on the rear of a gbody the spacer will need to be about 1" thick or even larger
also rear gtas can be mounted on the front of a gbody but will require a spacer of approx 5/16" and longer lug studs or use of et cone lugnuts

 

[jk kelly]

Thanks that explains it, and yes it is about a 1 inch spacer. Thanks again for the info i was just courious