How is this possible?

[JORGE]

Sorry guys,i hat to be so bored /forums/images/graemlins/blush.gifwith the wheels questions,but it is driving me crazy. /forums/images/graemlins/rotfl.gif

If we have a 10" widht wheel with a -39mm Offset,
How the hell it can to have a 4" Backspacing??

Widht /2 = Centerline
10" / 2 = 5"

Centerline-Offset = Backspacing
5" - 1.5"(39mm) = 3.5"

¿¿ 4"?? /forums/images/graemlins/confused.gif

 

[wrathORC]

Maybe they don't know the conversion factor. Who knows. It could be anything. I call 3.75" and 4" backspaced wheels 4" because they're so close and if you measure it the wrong way you'll end up with 4" anyway.

Just measure from the mounting surface to the spot where the outside of the bead would be and call it a day.

 

[Chris_T]

Offset and backspacing are calculated slightly different, but I don't remember how. PM Steve Chin or search and you might find it.