Offset - Backspace - ideal fitment - Calculation chart - Page 7 - Jeep Garage - Jeep Forum

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  #73  
Old 06-27-2016, 08:38 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

How much wider is that tire than stock? Divide that by two. Then measure from your stock tire to the control arm and control arm bolt. Is there room left over? I think a 1.5" spacer will put you under the wheel opening which will make contact under certain conditions.

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  #74  
Old 06-27-2016, 08:41 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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Originally Posted by SerenityWK2 View Post
Okay, so my stock wrangler wheels have an offset of 25, with a 1.5" wheel spacer they would be 0. I'm looking at a 275/70/17 with the OME 2" lift. Trying to decide if I should run with or without the spacers. I'm MUCH more familiar with building JK's (have done several) but this is my first WK2. Can I get away with no spacer on these tires? Or would I need one to push the tires out and away from the inner fender wells and other bits?
no, if the wheels are a 25 offset and you add a 1.5" spacer you are now at -13 offset (1.5" = 38.1mm). this is JK fitment, not Wk2. Why the desire for the spacer? you are good to go without it. the fit is much better without the spacer and youll be good to go on the tire choice all while getting a better overall look than oem
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  #75  
Old 06-27-2016, 09:19 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

I'll go without the spacer! I just made the incorrect assumption that I would need it like I would for a JK. Hadn't thought about leaving the tire completely inside the wheel well, but after I thought about/changed my way of thinking, it makes total sense.
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  #76  
Old 06-27-2016, 09:37 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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Originally Posted by SerenityWK2 View Post
I'll go without the spacer! I just made the incorrect assumption that I would need it like I would for a JK. Hadn't thought about leaving the tire completely inside the wheel well, but after I thought about/changed my way of thinking, it makes total sense.
With that offset and tire, you will still pikethe tire out a bit for a good look...but when it compresses (camber kicks in)and it will tuck inside nicely.
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  #77  
Old 06-30-2016, 01:10 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

here is a pic example of what im trying to preach in this post. using the correct offset allows you (via natural camber) to still tuck your wheels in, when at or near maximum compression of the suspension. As you see here, the passenger rear is almost fully compressed under load and the front is extended. As the rear suspension compresses, and the tire angle goes into negative camber, it allows for it to just barely tuck in without hitting the fender. Those of you who are going to a 0, +12, +18 offset, etc...this is why the fenders take a beating and you lose upward travel.






And the front, partially compressed...





This isnt a perfect example, because the vehicle is static right now and I was just trying to get an example shot. When moving and actively articulating (if you can call it that) there is still additional upward travel in the rear that Ive seen in some of my vids, where the top of the tread is fully inside the fenderlip.
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  #78  
Old 06-30-2016, 08:15 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Maybe this is a better place to post, as it may get noticed more.

I need some guidance and advice from the wheel gurus on the possibility of adapting wheels that are not meant for a 2014 Grand Cherokee Limited.

I'm looking at a set of 22" BMW X6 215 series replica wheels, with a bolt pattern of 5x120. Fronts are 22x9.5 with an offset of 40mm, rears are 22x10 with an offset of 35mm. Now, obviously I know I will need to get 5x127 to 5x120 adapters, but what else do I need to consider to help me make this decision? What thickness adapter would I need based on those offsets/widths? What about bore size, do I need to consider anything there? If my research is correct, it seems the new wheels have 2 different bore sizes, with the fronts being 74.1mm and the rear 72.56mm.

Based on willtheyfit.com, it seems everything will be "ok" (assuming I am reading it right), but I don't know if or how far they will stick out with adapters.

Are there any questions you can think of that I need to ask the seller? Since they are replicas, he hasn't been the greatest at getting me answers, but I'm trying to search on the web as much as possible to find the answers.

It's a killer deal, with all 4 rims (freshly powder coated black) and 4 Pirelli Scorpion tires for under $900, and I love the look of them, so I'm hoping it possible. I just need some advice on if it's even worth pursuing or trying to make them work.

Any help is GREATLY appreciated.

Thanks, Mike
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  #79  
Old 06-30-2016, 08:24 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Mike,
take this with a grain of salt....but in hate aadapters worse than I hate spacers

that being said , are you in love with these wheela...or just the price. The offsets, when combined with the adapters will be very agressive and I wouldn't recommend them at all.

I'dkeep lookin...
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Old 06-30-2016, 09:15 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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Originally Posted by alludc View Post
Mike,
take this with a grain of salt....but in hate aadapters worse than I hate spacers

that being said , are you in love with these wheela...or just the price. The offsets, when combined with the adapters will be very agressive and I wouldn't recommend them at all.

I'dkeep lookin...
Thank you very much for the reply. You basically confirmed my concerns.

I like the look of the wheels a lot, but potential safety issues/ having to deal with spacers/etc isn't worth a great deal. I just wanted to verify from someone who knows more than me about wheels that it's probably not worth the hassle.

Time to keep looking!
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  #81  
Old 07-01-2016, 09:44 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by alludc View Post
Mike,
take this with a grain of salt....but in hate aadapters worse than I hate spacers

that being said , are you in love with these wheela...or just the price. The offsets, when combined with the adapters will be very agressive and I wouldn't recommend them at all.

I'dkeep lookin...
I think I found a much better option, with no adapters or spacers involved!

KMC Wheels KM651 Slide 22x9.5 Black

Dual Bolt Pattern: 5x 127mm / 5x5" inch and 5x114.3 mm
Offset: ET 38
6.69" Backspacing
Hub center: 72.6
Part # KM65122954338

Tires- OHTSU
265/40/22

If I'm reading your chart correctly, those offset should be perfect, correct?
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  #82  
Old 07-01-2016, 10:10 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by pds910 View Post
I think I found a much better option, with no adapters or spacers involved!

KMC Wheels KM651 Slide 22x9.5 Black

Dual Bolt Pattern: 5x 127mm / 5x5" inch and 5x114.3 mm
Offset: ET 38
6.69" Backspacing
Hub center: 72.6
Part # KM65122954338

Tires- OHTSU
265/40/22

If I'm reading your chart correctly, those offset should be perfect, correct?



it will be a good fitment.... much better choice can'twait to see em!
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Old 07-01-2016, 10:12 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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Originally Posted by alludc View Post
it will be a good fitment.... much better choice can'twait to see em!
Thank you, appreciate your help and confirmation of fitment!
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  #84  
Old 07-11-2016, 10:38 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart



Here they are! Was only a 500 mile round trip, but well worth it for the price. These things had never even been mounted before.
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