Need Backspacing Help!

[LEEREED123]

i want to put 36x13.50x15 Iroks on 15x10 rims on my 91 blazer with 4 inch lift.
what offset or backspacing will i need so that i can still turn it? lol
i plan on doing minimal cutting on my fenders.
thanks guys!

 

[LEEREED123]

BUMP!!!!
PLEASE help!

 

[Beast388]

Well, I can't give you a definitive answer, but I can tell you that the more backspacing you have (larger number) the more tucked in the tires will be. So, having a BS of 4.25" will make the track narrower than say a 2.5" BS.

 

[LEEREED123]

so I'll need a negetive backspace to make sure that i dont scrub on the inside? any idea what size backspacing guys are running with 35' tires on 15x10's?

 

[Beast388]

so I'll need a negetive backspace to make sure that i dont scrub on the inside? any idea what size backspacing guys are running with 35' tires on 15x10's?

My rims have 4.25" BS.

 

[mechted]

my 73 has a 4" lift and 35s on 4.25" BS without any issues.... you should be fine with anything from 2.5 to 4.5 BS

 

[LEEREED123]

thanks guys. i didn't want to buy the rims and mount them and not be able to send them back.

 

[Beast388]

Here are the pics of my rims that you asked for in your PM.