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Discussion Starter #1
I am going to go to 35" tires and am wondering what backspace i will need on the new rims? I have not decided on 15" or 16" rims yet,whats your opinion?
Would the backspace I need be the same for both 15" or 16" size rim?
Was thinking about going with Rockcrawler Streetlocks 15x10 3.75" back space.Salesman says these would work great ,what do you experts think?

Thanks,
Daaron
 

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in the 16'' rims your limited to 4.5 or 4.75 or 5'' backspace...
the 15'' rims give you a choice to 3.75'' the tires will stick out a
bit but gives wider stance.

next time im getting 15''
more rim choices with the 5 on 4.5 we need
if i were to get new tires....
:wink:
 

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I'm running 35" MTR's on 15x8 rims with 3.75" backspacing, 4.5" of lift. Works great.

Brad
 

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Discussion Starter #4
Brad,
When flexed does your tires fit fine into wheel wells?Also what tire and size are you running?
What are your opinion on what is the best tire?I am happy with the Goodyears and my just get them again unless someone can advise otherwise.
 

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I am running 35's on 058 eagle alloys 15x10 with 3 5/8 backspacing. With both swaybars disconnected My rear tires will rub the flares at full compression.
 

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Brad,
When flexed does your tires fit fine into wheel wells?Also what tire and size are you running?
What are your opinion on what is the best tire?I am happy with the Goodyears and my just get them again unless someone can advise otherwise.
Tires stuff fine, nothing rubs but they come very close to the flares.

Tires - 35x12.50R15 Goodyear MT/R's
Wheels - 15x8, 3.75" backspacing
Suspension lift - 4.5" RE springs, Toys by Troy long arms
Body lift - 1" Daystar

There's a few flex shots in this photo album.

Everyone out here in the AZ desert swears by the Goodyear MT/R's for rock crawling so that's what I got. I'm happy with them and they are wearing really well.

Brad
 

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I have the same set up as Brad except I have .5" more BL...Everything fits fine. Here is a pic.



 

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Discussion Starter #10
Okay,it looks like the 3.75 backspace is what I need,now my next question.
I see most of you are using 8" rims.
I thought I had to use 10" rims,but it appears not.What are the pros and cons between 8" and 10'" rims?

Thanks
 

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8" vs. 10"

8 protects your rim better in rocks and make your tire slightly skinnier/taller

10" gives you a slightly wider patch/shorter tire

With 3.75 backspace the only difference between the 8 and 10 would be how far they stick out.
 

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The correct size you will need in a 16 inch tire is 315/70R16. You will need 1.25 inch spacers on the stock Rubi rims. The stock rims have 5 inch backspacing.

Jerry
 

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I believe Jerry meant to say
the Metric 35 is 315/75R16
the metric 33 is 305/70R16
The MTR version of this is 34.6" tall

I am actually going back to the Moab rims with 315/75R16s.
While my black rims looked really cool, I am sorry to say
THEY SUCK [dont lose beads, they just fill the bead with dirt!!!]

I am going to run the Spidertrax 1.25" wheel spacer to keep my turning radius. The spidertrax wheel spacers are both Hub and Lug centric which is very important so you do not break the stock studs.

The theory is that 8" rims will hold the bead better offroad, and 10" rims will ride better on the street. I say stick with the 8" rims. They work fine for both, weigh less, and since they are more narrow, are easier to balance and keep balanced. They will also keep your tires completely under extended flares.
 

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elff is right. My bad. Sorry.

Jerry
 

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I just wanted to make sure you order the correct size sir
I believe they could be installed at the same time as the gears and axles

*Poke*
 

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elff said:
I just wanted to make sure you order the correct size sir
I believe they could be installed at the same time as the gears and axles

*Poke*
elff, you don't care how you spend my money, do you?

Jerry
 

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JerryC said:
elff, you don't care how you spend my money, do you?
Jerry
Sure I do, I want to make sure it is spent wisely and frequently. No sense is wasting good money on non jeep stuff.
:)

I got my 315/75R16s mounted on the Rubi today

WhAT A DIFFERENCE !!!!!

My old rims/tires [35x12.5 on 15x10 steel rims] took anywhere from 5-11 pounds of weight to balance
My new setup has 1-2.5lbs on each wheel.

Each wheel/rim combo is now 15lbs lighter.
Overall I have noticed 3 things.
1) much more stable due to better balancing
2) Jeep is slightly taller on the 8" rims and the tires fit fully under the warn flares with my wheel spacers
3) The reduced weight has significantly reduced the amount of road bumps being translated up through the suspension.

I wish I had done it this way the first time around.
O well, It is a jeep thing, you will live and learn with your mods.
 
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