SpareTire

[1612202]

If anyone is interested in a spare tire the oem part number is 84095141 for the 17X4 inch wheel. Tire rack sell the tire for around$60. A spare from a 2006Buick Lucerne or a Cadillac DTS 2006-2011 125/70/17 fits with room for a jack and tools.

 

[hoys]

Hard to tell exactly in the picture, but I am assuming this fits with the wheel well mounted subwoofer, correct?

 

[1612202]

The subwoofer does fit in the wheel and the original hold down rod and nut fit. I had planned to use the wheel and tire from my 2015 Chevy Volt as a spare but there is no way for a wide tire to clear the support towards the front of the tire well. I also tried to fit a 145/70/17 compact spare and it would not clear the support. Not the best pictures I've ever taken.

 

[hoys]

Thanks for clarification! I'll be looking for one.

 

[Motormouth]

You’re the man! I came here to find this info haha.

Living in a city (Philadelphia), you gotta have a spare because of glass (and waiting forever for roadside is no bueno).

My last car had the bose stereo inside a full size spare so I knew it would be possible. Thanks!

 

[Rhetoric]

This is great!

My only concern would be that the tire used here (125/70R17) is 12.3% shorter than stock. That's quite a huge gap that could cause issues with the AWD system (mechanically and electrically). But I suppose if your goal is to limp a very short distance to safety, then that would work.

 

[tinmanwpk]

Better than sitting on the side of the road, or in some of the finer neighborhoods of Philadelphia (and I'm not talking about the Main Line).

 

[Motormouth]

For sure.

I guess ‘compact’ spare is the right term? I checked the stats of the cts sport wagon’s ‘compact’ spare:

Stock tire 235/50/18 (18x8) 27.3” roll dia
Spare tire 135/70/18 (18x4 rim) 25.4” roll dia

I think thats a 7-8% difference. We’ll have to find the correct rolling size, and ensure it clears the brake calipers (offset) and rotor.

 

[1612202]

The wheel does clear the front rotor with plenty of room to spare. It also clears the caliper but is a tight fit. I drove the car around the neighborhood making several tight right and left turns and did not have a problem. I mounted the tire on both front wheels to be sure of fit. The rear brake assembly is much smaller then the front so I saw no reason to mount the wheel.

 

[Motormouth]

Thanks for testing it out thoroughly. I think for use as an emergency spare a large-ish rolling offset isn't that big of a deal. Slow roll to a tire shop, stay off the highway.

 

[MelsRegal]

remember if you have a GS a 17" isnt going to work. This is another option.
https://modernspare.com/search-page/?make=7&model=19&syear=181&cfm=Buick&cfmo=Regal&cfy=2018

 

[Rhetoric]

The wheel does clear the front rotor with plenty of room to spare. It also clears the caliper but is a tight fit. I drove the car around the neighborhood making several tight right and left turns and did not have a problem. I mounted the tire on both front wheels to be sure of fit. The rear brake assembly is much smaller then the front so I saw no reason to mount the wheel.

Sounds like it works, even with the size difference! That's great news as I shop for non 17" winter wheel and tire options.

 

[19GSport]

remember if you have a GS a 17" isnt going to work. This is another option.
https://modernspare.com/search-page/?make=7&model=19&syear=181&cfm=Buick&cfmo=Regal&cfy=2018

"18×4 Aluminum Alloy Wheel With 5x120MM Bolt Pattern"
That won't fit, we need 5x115.

 

[MelsRegal]

did you contact Modern Spare and ask them if they have the correct wheel?

 

[hoys]

remember if you have a GS a 17" isnt going to work. This is another option.
https://modernspare.com/search-page/?make=7&model=19&syear=181&cfm=Buick&cfmo=Regal&cfy=2018

Unsure 100%, but aren't the rear brake assemblies the same size between GS and other trims? It isn't uncommon to swap a flat front with a rear wheel and put the spare on the rear. If two tires are flat you are boned anyway 🙂

 

[MelsRegal]

yes that is a work around but somewhat labor intensive in the middle of a rainy night.

 

[liuby33]

yes that is a work around but somewhat labor intensive in the middle of a rainy night.

Well I suppose that's the way to go if it is hard to get one compatible with all 4

 

[hoys]

yes that is a work around but somewhat labor intensive in the middle of a rainy night.

A flat tire is always an inconvenience. It would be best to find one that fits all though!

 

[milicz]

did you contact Modern Spare and ask them if they have the correct wheel?

I read this:

• Conveniently Fits Inside Trunk Tire Well With All Necessary Mounting Hardware Included. *Trunk Tire Well Mount Not Compatible With TourX & Sportback Models*

What does that mean exactly? Looking to get a spare.

 

[Kappy]

If anyone is interested in a spare tire the oem part number is 84095141 for the 17X4 inch wheel. Tire rack sell the tire for around$60. A spare from a 2006Buick Lucerne or a Cadillac DTS 2006-2011 125/70/17 fits with room for a jack and tools.

with a little research, according to www.gmpartsdirect.com wheel 84095141 is listed as fitting Regal Sportback & TourX. A little more checking and it also is listed as fitting the 2018 Equinox/Terrain. A quick check of Ebay shows 125/70-17 is what comes with 18 Equinox/Terrain as a spare.
So now what jack will work?