Why so many outcomes with a 2" lift? - Jeep Commander Forums: Jeep Commander Forum
Suspension / Lifts This is the place to discuss the suspension, lift systems, and other stuff underneath your Jeep Commander

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post #1 of 28 (permalink) Old 01-24-2019, 09:38 AM Thread Starter
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Why so many outcomes with a 2" lift?

I have read and researched and looked at pictures and videos of members of this site talking about their 2" lift.

It seems the most popular formula is this: (but not entirely)

- 2" RC lift
- 265/70-17 tires on rubicon rims
- spidertrax 1.5" wheel spacers
- jba upper control arms (but not always)

I have seen so many different types of responses:

- my tires cleared perfectly
- no problems
- my tires rubbed
- i had to do a fender liner mod with a heat gun
- i had to do a pinch weld mod with a grinder or a hammer

I guess the variables are the tire tread height and the rim type.

Maybe if you are getting an AT or MT tread tire, the tread height his higher than an LT tire?

If you are going with a rim with a wider or narrower offset, it changes where the tire turning radius will possibly hit?

I guess the most frustrating part is that a lot of folks state that with the above formula of parts it was a turnkey solution - and it seems not.


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post #2 of 28 (permalink) Old 01-24-2019, 11:32 AM
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Ha ha! Funny... I agree with your observation. There never seems to be a strong consensus with the outcome of these mods. For example, I have a 2" lift and 265/70/17 on factory wheels (and that's all). I will rub a touch at full lock, but not nearly enough for me to go the spacer route and then have to deal with deciphering the 'spacers are horrible and my wheels fell off' / 'I've had spacers for 10 years no problem' opinion division. Yet others with the same setup as I claim to not even be able to turn their tires a full rotation????

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post #3 of 28 (permalink) Old 01-24-2019, 02:16 PM
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i think some of it has to do with the state your existing suspension -- is it worn out or has all the bushings been replaced? having just replaced my LCAs, there is a difference in how the front sits and could be tad bit higher now.


you have to evaluate the knowns and be prepared to work around the unknowns
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post #4 of 28 (permalink) Old 01-29-2019, 12:46 PM
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Haha, yeah it's funny.

Have you changed anything in your suspension before?

It could be that some people don't change all their parts and ONLY do the spacer. For me, I changed everything: springs, UCA's, shocks/struts, etc. That, and tread hight, will give some various results.

I personally think if you haven't changed any suspension components since you've had it, you may just go the OME spring setup with Bilstein shocks/struts.

And yes...upgraded UCA are a must...if you want everything to work properly. The stock UCA are not meant for any kind of lift so its angles will be severe! Using the UCA rated for lifted XK's will help with this process and prolong the life of the bushings, etc.
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post #5 of 28 (permalink) Old 01-29-2019, 10:49 PM
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Quote:
Originally Posted by chaaz01 View Post
I have read and researched and looked at pictures and videos of members of this site talking about their 2" lift.

I have seen so many different types of responses:

- my tires cleared perfectly
- no problems
- my tires rubbed
- i had to do a fender liner mod with a heat gun
- i had to do a pinch weld mod with a grinder or a hammer

I guess the variables are the tire tread height and the rim type.


I guess the most frustrating part is that a lot of folks state that with the above formula of parts it was a turnkey solution - and it seems not.
I can point to a few reasons why this is the case;

Despite using the same lift kit and the same tire size there are a few variables that are almost always going to be different from one Commander to another;

1) Different suspension components; IE different Shocks/shock absorbers; Different springs; The UCA's whether they are JBA's or stock, have very little effect on the outcome one way or the other;

2) Same tire size from different tire companies; No 2 tire companies produce tires with the exact same dimensions - there will almost always be subtle differences in the width/height of 1 company's 265/70/17 compared to anothers; also some members are running P's (Passenger) tires while other are running LT's (Light Truck) Tires - LT tires are a little thicker, wider & heavier than Passenger tires.

3) This is probably the biggest & most common cause of mixed results; That would be all of the different variations in width, back spacing & offset of all the different types of after market rims that are being used;

I can tell you almost definitively, if you run a 17 x 8 inch rim with 0 mm offset and 5.5 inches of back spacing with P265/70/17's and the 2 inch Rough Country spacer lift kit, you will NOT have any rubbing - even if you have not done the pinch weld mod and have no wheel spacers.
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Last edited by Big Blue; 01-30-2019 at 09:07 PM.
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post #6 of 28 (permalink) Old 01-30-2019, 06:55 PM
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Quote:
Originally Posted by Big Blue View Post
I can tell you almost definitively, if you run a 17 x 8 inch rim with 0 mm offset and 5.5 inches of back spacing with 265/70/17's and the 2 inch Rough Country spacer lift kit, you will NOT have any rubbing - even if you have not done the pinch weld mod and have no wheel spacers.
That's a bit of a dangerous statement; the RC lift alone depends heavily on the stock springs and shocks, which may have sagged significantly.

For instance, when I threw an RC lift on mine, I rubbed even on 245/70s with stock wheels, both with and without 1.5" spacers. That's not a normal case, but it can happen.

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post #7 of 28 (permalink) Old 01-30-2019, 08:42 PM
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Quote:
Originally Posted by consumedbywater View Post
That's a bit of a dangerous statement; the RC lift alone depends heavily on the stock springs and shocks, which may have sagged significantly.

For instance, when I threw an RC lift on mine, I rubbed even on 245/70s with stock wheels, both with and without 1.5" spacers. That's not a normal case, but it can happen.
Quote:
Originally Posted by Big Blue
I can tell you almost definitively, if you run a 17 x 8 inch rim with 0 mm offset and 5.5 inches of back spacing with P265/70/17's and the 2 inch Rough Country spacer lift kit, you will NOT have any rubbing - even if you have not done the pinch weld mod and have no wheel spacers.
cbw;

I've used this exact set-up on stock springs, UCAs & shocks and had zero rubbing with 2 different brands of P265/70/17's.

So based on my experience, I'm pretty confident in that statement.


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Last edited by Big Blue; 01-30-2019 at 09:07 PM.
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post #8 of 28 (permalink) Old 01-31-2019, 10:46 AM
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Quote:
Originally Posted by Big Blue View Post

I can tell you almost definitively, if you run a 17 x 8 inch rim with 0 mm offset and 5.5 inches of back spacing with P265/70/17's and the 2 inch Rough Country spacer lift kit, you will NOT have any rubbing - even if you have not done the pinch weld mod and have no wheel spacers.
Really?!

That's weird...even with my OME lift I still get slight rubbing with 265/70/17. BUT, I am sporting JK wheels.
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post #9 of 28 (permalink) Old 01-31-2019, 04:06 PM
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Quote:
Originally Posted by BadJuju View Post
Really?!

That's weird...even with my OME lift I still get slight rubbing with 265/70/17. BUT, I am sporting JK wheels.
Now again, I was referring specifically to the 2 inch RC spacer lift;

That being said, I'd be willing to bet that if you do some research and come up with the exact measurements, backspacing & offset of those JK rims - and compare them to the specifications that I listed (17 x 8 inch rim with 0 mm offset and 5.5 inches of back spacing with P265/70/17's and the 2 inch Rough Country spacer lift kit) you will find the answer as to why you have slight rubbing.


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Last edited by Big Blue; 01-31-2019 at 04:09 PM.
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post #10 of 28 (permalink) Old 02-02-2019, 11:50 PM
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Quote:
Originally Posted by Big Blue View Post
cbw;

I've used this exact set-up on stock springs, UCAs & shocks and had zero rubbing with 2 different brands of P265/70/17's.

So based on my experience, I'm pretty confident in that statement.
You may not have had any issues, but the state of the stock suspension varies greatly from vehicle to vehicle. As I mentioned, I ran the exact same RC lift and couldn't clear a tire nearly 2" smaller than a 265. So I'm pretty confident in saying that your statement doesn't apply to all XKs.

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