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  #37  
Old 04-20-2016, 12:22 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by rhino8888 View Post
I have a '14 with QL and with stock 20's and 1.25" spacers. That puts me at +24 mm of Backspacing.

At +24 bs, which will fit better, 275/55 or 285/50? Will both?

The 285's will go out farther toward the fender and might not "tuck in" to the fender under compression.
The 275's will clear the fender better but have a larger diameter.
I'm not sure which will be a closer fit or rub.

Can anyone share who has had one of these set ups?

Planning on nitto G2's.

Thanks!

Both of those tire sizes fit on mine, without lift and without spacers....

pushing out to that offset with the 1.25 spacers will likely cause you to grab a lil felt. no big deal. I wouldnt be concerned with running either size tire. its a quick fix.

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  #38  
Old 04-28-2016, 06:14 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

I had no idea how many direct messages this post would generate.

Please post your questions in here so everyone can see, and they show up on searches. thanks.
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  #39  
Old 04-28-2016, 09:30 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Quote:
Originally Posted by rhino8888 View Post
I have a '14 with QL and with stock 20's and 1.25" spacers. That puts me at +24 mm of Backspacing.

At +24 bs, which will fit better, 275/55 or 285/50? Will both?

The 285's will go out farther toward the fender and might not "tuck in" to the fender under compression.
The 275's will clear the fender better but have a larger diameter.
I'm not sure which will be a closer fit or rub.

Can anyone share who has had one of these set ups?

Planning on nitto G2's.

Thanks!

I have been going back and forth with the guys at Chief products about their 11 QL. They run 33x12.5x18s on the Mopar off-road wheels. Right now they have NO LIFT on the QL, but they did some trimming and slight mods on inner fenders. They also run a 1.5" spacer. They are planning on going to a 1.25" or even a 1" spacer. They told me they believe the 1.25" will be the sweet spot. Go to their website and look at the videos and pictures. They wheel it pretty hard.

After much back and forth I am almost certain I am going with the 275/60/20 Nitto g2. I am looking at factory 20s with a 1.25" Bora spacer. I also do have a controller on my QL and run it everyday at 1.25" above Normal Ride Hight. I don't notice any change at all in the ride. I also can go up to 2" above Normal Ride Height, but it does feel stiffer. It's not bad at all at 2" for me, I'd compare it to riding in a sports car.
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  #40  
Old 04-29-2016, 09:52 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Question for Alludc.....

Thanks for all your info on this thread you certainly are a wealth of knowledge on this subject and have built an amazing GC!

I have a 2014 Limited...I want to install the $400 RRO 2.5" lift, no new shocks for now. I want to use the ATX Atrillery wheels in a 20x8.5x20 with a +35 offset and Toyo AT II tires....Can I fit a 33x12.5x20 (or 305x55x20) without any rubbing or additional modifications?
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  #41  
Old 04-29-2016, 02:43 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Can you ask them to describe "Sweet spot" and specifications on the "Mopar off road wheels"?
The part number on the wheels will work just as well. I can look up the specifications. .
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  #42  
Old 04-29-2016, 02:52 PM
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Offset - Backspace - ideal fitment - Calculation chart

I'll try to. It's a slow process with the time difference and I imagine the get flooded with the questions. If you are on Facebook I can probably send you the info that they sent me. You can also look on their website at the wheel and find it to get the info. It's the 18" Mopar Off-road wheel. I think it's 9" wide also and they think the 1.25" spacer is it. They use a 1.5" now.
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  #43  
Old 05-01-2016, 01:26 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Ok...guys im new here and could use some help on tires. I cant seem to wrap my head around what is being said here.

I have a new 2016 JGC HA 44 with QL on order.
I plan on changing the stock rims with 20x10 spider monkey wheels...SRT replicas. What is the biggest most agressive tire i can use and also give it a wider stance? Can i put a 275/55 20 on it? Do i need a spacer? Should i do something else? Im a bit confused on exactly what i need.
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  #44  
Old 05-01-2016, 08:36 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Shubba,

I went yesterday to a local tire shop and they mounted a 275/55/20 Toyo ATII on a 20x9 Raceline wheel with a +18 offset. The wheel fit my 2014 limited with about 2 mm clearance (no spacer). The tire sat a bit wider than my fender (which I liked alot) and I am going to add a 1.75" coil spacer in the front to improve my clearance, but the 275 fit.
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  #45  
Old 05-01-2016, 11:35 PM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Carmstrong,
Thanks for the info. Have any pics of your setup yet?
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  #46  
Old 05-02-2016, 09:06 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

No pics yet...just shopping for my mods. I am still looking for someone who will install a 2.5" RRO lift for me. Once I get that done I will finalize the tires and wheels.
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  #47  
Old 05-03-2016, 07:50 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Alludc I keep coming back to this thread. Am I correct in my understanding that the optimal set up is a wheel 8.5" with +30 offset. Obviously your opinion but a close look at your set up and real world experience gives this alot of validity.
My question is what criteria are we looking at.
1. assuming we select a wheel that clear the calipers whether stand or HD. This resolves that potential problem.
2. We then need to look to clearing UCA bolt when going Bigger
3. Try to stay inside the fender trim with wheel Offset in combination of tire width.

Is there anything else to be aware of out side of these 3?
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  #48  
Old 05-05-2016, 11:08 AM
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Re: Offset - Backspace - ideal fitment - Calculation chart

Is 1.25" the only option on spacers? I wasn't looking to get that extreme - could I go with 1/2" or does that throw off the hub centering and/or lug thread length?


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