The 17" wheels im looking at come in a 9 inch width with a +45mm offset. If my calulations are correct, that comes out to about a 6.27 inch backspace. Im looking to run these on all 4 corners with 275/45/17's. I know this isnt optimal for a 9 inch wide wheel, but I can get a good deal. Will these rub or be underneath the car so far it looks goofy? My other option are 8" with 0 offset or 4" backspacing. Would that be the better choice? Thanks.

8" wheels need 4.5" bs 9" need 5" bs. I think 6.25" will cause rubbing on the inner wheelwells

The 17" wheels im looking at come in a 9 inch width with a +45mm offset. If my calulations are correct, that comes out to about a 6.27 inch backspace. Im looking to run these on all 4 corners with 275/45/17's. I know this isnt optimal for a 9 inch wide wheel, but I can get a good deal. Will these rub or be underneath the car so far it looks goofy? My other option are 8" with 0 offset or 4" backspacing. Would that be the better choice? Thanks.

Zero offset on a 9" wheel is right at 5" backspace. Add 45mm and you're almost to 7" of backspace. Those wheels won't fit as is but would work fine with a high quality 2" spacer.
A zero offset 8" wheel should be closer to 4.5" backspace,not 4".

I think I want to go with the 8". I dont want the wheel adapters. Trying to stay on a budget. Any reason not to go with a 245/45/17?

My only suggestion is do it the way you Really want,the first time. Re-do's get expensive.

I hear you Clint. Unfortunatly I need new tires and Im sick of my rallys. I really want 18" Budnik Hammers, but I cant afford them. I have a friend that works for a wheel manufacturer that might be able to get me some nice aluminum 17x8's for cost, maybe free. I really want to try a low profile combo before investing $3000 that I dont have.

I hear you Clint. Unfortunatly I need new tires and Im sick of my rallys. I really want 18" Budnik Hammers. I have a friend that works for a wheel manufacturer that might be able to get me 17x8's for cost, maybe free. I really want to try a low profile combo before investing $3000 that I dont have.

18x8 Hammers with 245's all around should look & work fine. What kinda money you talking there? Budniks aren't cheap wheels.

I was saying I cant afford the Hammers. Almost $500 each rim. I should be in the neighborhood of about $300 total with wheels, tires, and balancing after I sell my rallys. Thats not bad for a 17" setup.

What wheels are those?

The 17" wheels im looking at come in a 9 inch width with a +45mm offset. If my calulations are correct, that comes out to about a 6.27 inch backspace.

Just a clarification on what Clint was saying, so you can recalculate correctly...

Example: On your 17 X 9" wheel, the 9" measurement is between the bead seats (where the tire actually sits)...

BUT, the overall width of a bare 17 X 9" wheel is actually 10"... Backspacing is taken from the very outer edge of the inside of the wheel. "Offset" is figure from the center of the wheel

45mm is ~1.77", with zero offset a "9-inch" wheel will have 5.00" BS, add 1.77", and the 45mm offset wheel will have 6.77" of BS (almost 7" as Clint was saying)...

Thanks for the help,Tony. Offset always gives me problems. :D