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  #61  
Old 05-10-2016, 08:19 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Alludc,
I appreciate your "real world" knowledge on this topic rather than hypotheticals!

How much trimming did you have to do with your set up? I noticed at the beginning of the thread you stated that a slight rub will occur by adding the Bilsteins to the RRO lift at the .4 notch.

Will HD Brakes affect fit, offset, rubbing etc?

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  #62  
Old 05-14-2016, 09:47 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Hate to ask. I know your getting a lot of questions.

Just bought a 15 limited. Only have 800 miles on it so far.
But I want new wheels already. But keep the stock tires for money reasons. Eventually will lift and new tires.

But for now. Stock 20" tires. 20x10 18mm offset. Will I have any trouble

Also another wheel I want is 20x9 18mm offset. But I'd rather go with x10 so when I lift and go with larger tires they won't be ballooning these narrow 9"

If u have time. Give your thoughts.
Thanks
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  #63  
Old 05-17-2016, 08:20 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by alludc View Post
likely the 275/55 would be no problem, but would need the offset of the replicas to calculate

Basically same question. 20x10 +50 offset. Tire size 265 60 20 (32.5"x 10.4). I just finished the pinch weld and trimmed the felt. I was gonna go 275 60 20, but changed my mind. Also I have 1.25" spacers. I just put a 275 65 18 on my spare wheel and that fit perfectly. Tire is 32.1" x 10.8. The lid for spare is about a .5" from closing all the way, which doesn't bother me. I was just looking for input about the 10" wide wheel, +50 offset, & 1.25" spacer.
Thanks.
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  #64  
Old 05-17-2016, 10:26 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by ARWK2OL View Post
Basically same question. 20x10 +50 offset. Tire size 265 60 20 (32.5"x 10.4). I just finished the pinch weld and trimmed the felt. I was gonna go 275 60 20, but changed my mind. Also I have 1.25" spacers. I just put a 275 65 18 on my spare wheel and that fit perfectly. Tire is 32.1" x 10.8. The lid for spare is about a .5" from closing all the way, which doesn't bother me. I was just looking for input about the 10" wide wheel, +50 offset, & 1.25" spacer.
Thanks.
basically thats a +18 setup on a 20x10. with that tire and the mods you have done in the fenderwell you should be good....I assume you have some lift tho? Aggressive stance, but I assume you know that.
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  #65  
Old 05-17-2016, 10:27 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by carmstrong33 View Post
Alludc,
I appreciate your "real world" knowledge on this topic rather than hypotheticals!

How much trimming did you have to do with your set up? I noticed at the beginning of the thread you stated that a slight rub will occur by adding the Bilsteins to the RRO lift at the .4 notch.

Will HD Brakes affect fit, offset, rubbing etc?
when I added the bilsteins, i had to simply pin back the felt a touch. thats it. HD brakes only keep you from running (most) 17s.
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Old 05-17-2016, 10:29 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by rbryant4 View Post
Hate to ask. I know your getting a lot of questions.

Just bought a 15 limited. Only have 800 miles on it so far.
But I want new wheels already. But keep the stock tires for money reasons. Eventually will lift and new tires.

But for now. Stock 20" tires. 20x10 18mm offset. Will I have any trouble

Also another wheel I want is 20x9 18mm offset. But I'd rather go with x10 so when I lift and go with larger tires they won't be ballooning these narrow 9"

If u have time. Give your thoughts.
Thanks
personal opinion, stay 20x9. balloon, is good. its protection. and your stock tires on a 10 right now will look horrible. again, in my opinion
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  #67  
Old 05-17-2016, 10:53 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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Originally Posted by alludc View Post
basically thats a +18 setup on a 20x10. with that tire and the mods you have done in the fenderwell you should be good....I assume you have some lift tho? Aggressive stance, but I assume you know that.

Yes on the lift. It's a QL that I will be running at 1.25" above normal ride height. Thanks for the info. Hopefully putting in an order on wheels within the week.
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Old 05-17-2016, 11:06 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Thanks to ALLUDC for your input...

After weeks of self debating, I finally pulled the trigger and ordered the RRO 2.5" lift with Bilstien 5100s, BR 20x8.5 +30 wheels and 305x50x20 Grabber AT2's (basically 32" x 12").

Hopefully everything will install without any issues???
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  #69  
Old 05-19-2016, 11:18 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

ALLUDC's insight (along with many others who replied) has been incredibly helpful. For those looking to use spacers as an alternative or compliment to offset wheels, I created a simple workbook to help.

The "current" column is pre-loaded with the OEM stock measurements that came with my jeep. The "proposed" column can be populated with your new (if applicable) tire, wheel, and spacer. I currently have it filled out with aftermarket items I purchased so I could gauge the total outward change. You can also use it to compare or mirror from other modified jeeps (if you know their specs).
Attached Images
File Type: jpg Spacer Impact.jpg (71.1 KB, 33 views)
Attached Files
File Type: zip Spacer Impact Update.zip (35.2 KB, 15 views)
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Old 06-02-2016, 03:20 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Ok, i think i am reading this right but want to check before i place my order. I have a '14 limited no QL. I should be able to run a 275/55/20 on a 20x9 +37 offset. I may have to trim/bend some felt depending on tires.
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  #71  
Old 06-02-2016, 08:01 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by redrex15 View Post
Ok, i think i am reading this right but want to check before i place my order. I have a '14 limited no QL. I should be able to run a 275/55/20 on a 20x9 +37 offset. I may have to trim/bend some felt depending on tires.
Yes that should be a good fit. I had 20x9 +34offset with 275/55/20 KO2s and it rubbed on the inside of the outter fender only when compressed a lot. there is a plastic clip above the wheel which holds the felt to a metal peice. You can pull out that clip and bend the metal back if you have any issues. Mine didn't rub after that.
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  #72  
Old 06-27-2016, 08:31 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

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?
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