What backspacing do I need?

I'm going to be putting on the 3" OME lift here shortly as well as new tire and wheels. I'm uncertain what backspacing I'm gonna need. I'm gonna be running 285/70/R17 Cooper Discoverer STT tires and 17x9 Procomp 7032 wheels

 

If those are the wheels you're going with, I don't think you have a choice. They are only offered with 4.75" back space.

 

Really cutting it close on stock UCA's with a 4.75" BS. Ideally, 4.25-4.5" of BS will work but 4.75" will probably rub. You can always get 1/2" spacers if needed or do a test fit if possible.

 

Dude you have to post pictures on TW once your all installed maybe some front and rear shots. I have the 3inch OME and Pro Comp 7089's as well. Have you ever though of 255/80/17 its 1inch narrower than the 285's which will be better on fuel, maybe acceleration, and better for snow. I already have the Nitto Terra Grapplers in the 285's and wanna try another tread. The Cooper Discoverer S/T Maxx look sick i cant wait to get them. Also the 255's are $216 and the 285's are $262

Discount Tire Prices for Cooper Discoverer S/T Maxx

255's = $864 not mounted and balanced

285's= $1048 not mounted and balanced

Difference in price is $184

 

Not sure what BS those wheels come in but with 33"s, 4.5" BS is pretty much standard or a -12MM offset.