OK guys, I am thinking of getting Xtreme Alloy 7105 in 17x9 and 4.75" BS. Now my stock wheels are 17x7.5 and 5.75" BS. If I figured correctly the new wheels with my 285/70/17 BFG KM2's will stick out past the truck 1.75". (9-7.5=1.5/2=.75----->5.75-4.75=1----->1.75")

How do yall think this will look? Any pics of a similar scenario would be nice.

Most people seem to be running 18-20's that have a much bigger BS and closer to stock and even though they are wider they seem to look fine.

Any opinions, pics or suggestions?

 

I have some 18x9 with 5.5" backspacing wheels wrapped in 285/65/18 and it looks really good, sticks out further than stock but not too bad. It's nice!

 

So you are 1/4" from the stock BS...so it should be less than 1" out from stock...

Any pics??

 

I have an 07 F150 with American eagle alloys which have 0 offset, i wrapped them in 295/70/17 toyo open country M/Tand they look sweet, however i also added bushwacker pocket style fender flares. They looked good without the flares but the paint on the side of the truck would have taken a beating.

 

actually the stock backspacing is 5.5. so his rims would stick out 1.5 inches further than the stock rims.


and a 9 inch wide rim with 4.75 backspacing will stick out 2.25 inches further than the stock rim. the easiest way to figure this. is the falowing formula.

(new rim width - stock rim width) + (stock backspacing - new rim backspacing) = how much further the new rim will stick out beyond the stock rim.

 

We are saying the same thing with the exception of you're not splitting the wheel width in half which you would have to do.

The 1.5" that the new wheels are wider by, is not only distributed to the front side of the wheel. 3/4" would be to the front and 3/4" would be to the back. Some may be 5.5" but I measured my backspacing on my stock wheels at 5.75". So, my original post with the formula should be correct.

9-7.5=1.5 width diff.
1.5/2=.75 width front side
5.75-4.75=1 offset diff.
total out from stock 1.75"

 

Your measurement is probably off. Pretty sure all factory wheels (with the exception of maybe the 20s or 22s,) are 5.5" BS.

 

exactly dont divide by 2 its not 3/4 in back and 3/4 in front
9 inch - 7.5 inch =1.5 inchs then 5.5 stock bs-4.75 new bs =.75 =2 1/4
Here are 18x9 5 inch bs see how far they stock out im 2 inchs past stock.

 

Well, I may be off then...That's all the better. That would make it 1.5" past where the stock wheels are.

 

i have the 18x9 MM951's with 4.5" backspacing... i think it looks like crap. if you are running 9" wide rims, the best look is around 5.25-5.75" BS... unless you like that really wide look (think geo metro on blingy rims)

take it from me, i have the setup, i would trade ANYBODY for wheels with about 5.5" BS on AT's for my 951's on mud graps

 

^ is that the rims you're talking about? I think that looks pretty dang good

 

I'm trying to get why it adds the width difference to only the front side. Why would the new width not be divided by two? The wheels would be different width based on the center line of the wheel I would think.

 

BS is the measurement from the back to the mounting point, not the true center.

Look at it this way.

8" wheel. 4" backspacing. Say it sits exactly even with the fender.

9" wheel. 4" backspacing. This will be 1" out from the fender.

Stock - 7.5" wheel, 5.5" backspacing. (2" from hub to outside of wheel.)
New - 9" wheel, 4.75" backspacing. (4.25" from hub to outside of wheel.) <--- this yields 2.25" more than stock, sticking out from the fender.

New wheel width (minus) Old wheel width.
Old wheel BS (minus) New wheel BS
Add those numbers

That help? Offset is a whole other ballgame.

 

you do not split the 1.5 in half. the backspacing is the distance from the mounting surface back of the wheel. so you add the whole 1.5 to the outside of the rim. plus you have to add the difference between the backspacing which is .75" which adds up to 2.25" further out than stock. if you do not beliefe me you can go and ask in the after market wheels and tires forum and you will get the same answer. there is a few experts in there who know more than me on wheels who can confirm my answer.

 

Correct, those wheels will stick out 2.25" further than stock. There is no debate - that is the correct answer.