|
zmetalmilitia -> RE: Need some good advice... (1/30/2008 8:33:02 AM)
|
The way I understand it is this: backspacing is the clearance the wheel has from the face of the rotor, where the wheel and rotor touch, to the back lip or inside lip of the wheel. Ex. if you have a 8" wide wheel and you have 4.5" backspacing, then from the point of where the wheel mounts to the rotor, there is 4.5" of wheel to the inside of the car. The other 3.5" would come towards the outside of the car, towards the fender. Offset is another confusing matter. The offset is the distance from the center axis of the wheel, in relationship to the mounting point on the rotor.
Ex. Offset is the distance from the center of the wheel to the inner side ( where the tire lip sits against the rim ).
You can have positive offset or negative. Front wheel drive cars tend to have positive offsets, with the wheel
flange toward the outside of the wheel.
In theory subtracting the wheel center line from the backspace gives you positive or negative offset amount.
If my rear wheels are 9.5" width. Backspacing is 5.25". Therefore the center line is 9.5"/2 = 4.75"
To find the offset we subtract (backspace) 5.25" - (center) 4.75" = 0.5" or 12mm approx.
Backspacing and offset seem to be in direct relationship with each other. Good luck.
|
|
|
|
