Vechile at dealer, need opinions! - Larger tires and Air ride - Jeep Garage - Jeep Forum

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  #1  
Old 02-17-2015, 01:12 PM
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Vechile at dealer, need opinions! - Larger tires and Air ride

Hi All,

Put on larger tires a few weeks ago, and just got a "Service Air Suspension Immediately" notification a few days ago.

The dealer has it now and said they re-calibrated the air suspension because I affected the ride height and threw the system off. Park mode will need to be disabled now because of rub issues (it was rubbing in park mode). This doesn't make a whole lot of sense to me, as the air suspension is leveling/adjusting based on the suspension as it relates to where I'm assuming the A-Arm is in relation to the body...not the height off the ground.

Also said because of the new calibrations that I will need an alignment and he's unsure if you can now use factory alignment specs. He will get back to me on that. If factory specs are OK, i'll have the alignment done elsewhere for half price.

Anyone else who installed 275/55/20's have an air suspension issue?

Thank you!

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Old 02-17-2015, 01:43 PM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

I'm running (and have been for several months) LT275/65/18s with QuadraLift and have been having no issues at any ride height or speed whether on road or off and my tires are ever so slightly larger than yours (see pic below) and I have no rubbing.

Your dealer shouldn't need to make any adjustments due to tire size as my dealer hasn't and they are aware of all mods I've made to my vehicle.

The only mental note I have to make is that at around 40mph I'm going about a mile faster than the speedo reads and at 65mph I'm going about 2mph faster than speedo reads. Also no alignment issues done once at dealer and once at alignment specialist shop.

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Old 02-17-2015, 02:01 PM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

The 2013 / 2014 Air Suspensions are different, especially builds after Aug 2013. They use different components and there is an auto park height option, so it is likely the OP is in a different situation.
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Old 02-17-2015, 03:48 PM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

So I talked to one of their technicians and things make more sense now. The larger tires absolutely rub in park mode, my lowest setting...because I have popped my fender flares off. No damage, they pop right back in.

The tech said that the car still thinks the small tires are on there so every setting is "lower" than it should be as it related to fender to tire distance. Basically what he did is raise every setting by whatever interval it takes to not have it rub. So if he calibrated it so that park mode is .25" higher, every mode will be .25" higher. I do not know how much he actually raised it...could have been 1/2"...not sure.

This is the reason he said i'd need an alignment. You're supposed to align in Aero mode, and if Aero mode is now .25-.5" higher than it was before, alignment could be thrown off.

he said he'd have like to go a little higher, but in off road 2, it was throwing an error because it went too high.

Glad I talked to the tech, things made sense. The compressor motor overheated and blew a fuse, but they are replacing it for me. Said he replaced the fuse, but the motor sounded funny, so figured they'd replace it. Immediately appreciate my MaxCare warranty!

Not paying them $189 for an alignment though...will have that done elsewhere for much cheaper.
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Old 02-17-2015, 05:54 PM
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Talking Re: Vechile at dealer, need opinions! - Larger tires and Air ride

That's strange. I'm also running 275/65/18s (a larger tire than yours) on my 2014 with QL and I don't even come close to rubbing at Park height. Maybe it has something to do with a different tire brand or maybe a different offset between the 18" and 20" rims.


It's cool to know though that the QuadraLift can be recalibrated to a higher height to fit even bigger tires.
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Old 02-18-2015, 08:03 AM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

Useful info. It appears that people with Quadra-Lift and 18 inch rims can run safely a taller tire (1 inch taller). I too am looking at tires and weighing my options but I will probably select a narrower, taller tire 255 x 65 x 18 or a narrower but similar sized tire in overall diameter 245 x 65 x 18. The first one is only about half inch taller n overall diameter and I am leaning towards it.

Narrow tires on SUVs may be counter-intuitive but give you better off road performance and winter weather performance and better dry asphalt fuel economy. High cornering grip at high speeds is an SRT consideration at the race track only. I got wider tires on my modified Subaru but on the Jeep I dig the narrower look and the added benefits.

Even Land Rover LR4 and the Range Rovers run narrower, taller tires than us. Maybe...maybe there's a reason besides looks.
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Old 02-18-2015, 10:34 AM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

Quote:
Originally Posted by Andoskyy View Post
...edit...

Not paying them $189 for an alignment though...will have that done elsewhere for much cheaper.
$189???

Wow, what a rip-off!

I just had an alignment done at my local dealer (Fury in S. St. Paul, MN) because I had new tires put on a short time ago [and I'm almost at 30K miles].
I only paid $95.
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Old 02-18-2015, 10:53 AM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

Quote:
Originally Posted by BigCat View Post
I'm running (and have been for several months) LT275/65/18s with QuadraLift and have been having no issues at any ride height or speed whether on road or off and my tires are ever so slightly larger than yours (see pic below) and I have no rubbing.

Your dealer shouldn't need to make any adjustments due to tire size as my dealer hasn't and they are aware of all mods I've made to my vehicle.

The only mental note I have to make is that at around 40mph I'm going about a mile faster than the speedo reads and at 65mph I'm going about 2mph faster than speedo reads. Also no alignment issues done once at dealer and once at alignment specialist shop.

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What brand/model tire are you running? I would like to change mine out to this size but I know from Manufacturer to Manufacturer dimensions vary even on the same size tire and I want to limit the chances of it rubbing.
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Old 02-18-2015, 11:41 AM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

Goodyear Duratracs in LT not P


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Old 02-18-2015, 11:53 AM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

I did finally find time to install my 1.25" spacers on Monday. When I pulled my front wheels I did fold back my felt liners and hammered the bottom half of the pinch welds in the back of the wheel well flat to ensure no rubbing at full wheel turn either left or right.


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Old 02-18-2015, 12:02 PM
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Quote:
Originally Posted by BigCat View Post
I did finally find time to install my 1.25" spacers on Monday. When I pulled my front wheels I did fold back my felt liners and hammered the bottom half of the pinch welds in the back of the wheel well flat to ensure no rubbing at full wheel turn either left or right.

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Tks. Did you have any rubbing at full lock previous to that? Also, I am new to modding, so please excuse the stupid question, but what exactly do the spacers do and what pros/cons are there with them? Do they just push your wheels/tires out further? Is there any added strain to any part of the axle?
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Old 02-18-2015, 12:30 PM
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Re: Vechile at dealer, need opinions! - Larger tires and Air ride

Quote:
Originally Posted by JMessick82 View Post
Tks. Did you have any rubbing at full lock previous to that? Also, I am new to modding, so please excuse the stupid question, but what exactly do the spacers do and what pros/cons are there with them? Do they just push your wheels/tires out further? Is there any added strain to any part of the axle?

I only had slight rubbing when actually rock crawling during flex and wheel stuffed into the wheel well.

I did spacers personally just to improve the look/stance of the vehicle especially since I have bushwacker fender flares it brings my tires back out to a little more than flush with the outside edge of the fender flares.

One could argue that the wider stance could help or hinder in varying situations while off-roading

As far as added strain - others may chime in - but in my situation it does not concern me.


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