2nd gen backspacing?

Does anyone know what backspacing the factory 07 sport rims have?Ive been tring to deal with a wobling issue at about thirty five mph to 60 just put on 285.70.17s have a 3 1/2 inch downey lift firts it was rubbing the a arm then i put spacers of 1 1/2 and it started to wobble then i swithced them to 1 inch spacers same problem so the yota man said lets try swapping rear for front tires see if it is balencing and now its cool i think no more wobble but im still rubbing the mud flat on bumps so im considering new rims, but what backspacing do i need ? thank any help is appreciated Tim707taco

 

U should be ok with 17x9 wheels with 4.5" backspacing.

 

ya pretty much 16x8 with 4.5 bs or 17x9 with 4.5bs. You will have to get under there and cut some of your mud flaps and plastich sheeting away though. No way of getting around it far as i know

 

yeah, maybe u need to do some minor trimming and remove front mud flaps!!!