Proper Backspacing For 15x8 And 15x10 On S13.

[PROJECTRB240SX]

EVERYONE TALKS ABOUT OFFSET BUT WHAT WOULD THE PROPER BACKSPACING BE FOR 15X8 FRONTS AND 15X10 REARS ON A S13 BE? I HAVE A COMPANY THAT DOES CUSTOM WHEELS AND THEY NEED BACKSPACING NUMBERS TO BUILD MY WHEELS....

I HONESTLY DON'T KNOW ANYTHING ABOUT WHEEL DESIGNS AND NUMBERS SO I'M ASKING YOU GUYS FOR HELP.

[hannibal]

Backspacing and offset are related. On stock S14 SE wheels that are 6.5" wide with +40mm (1.57") offset, backspacing would be...6.5" / 2=3.25"3.25" + 1.57" = 4.82"

SO for 10" wide wheels, any positive offset would give you at least the same backspacing as stock S14

10" / 2=5"4.82" - 5" = -0.18" = -4.5mm

So as long as your offset is greater than -4.5mm, you'll have at least the stock backspacing (4.82")