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2008 Cadillac CTS
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Forgive me for posting a new thread, but I was unable to find info regarding the tires for the 2008 CTS. I know the Summer package includes W-rated Michelin PS2's, but what are the standard all-season tires?
Don't know the name, but here is the size.

P235/55R17 H-rated Michelin ALS
 

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the tires on the base car are P235/55R17 H-rated Michelin ALS Primacy MKV4's
The AWD gets P235/50R18 V-rated ALS Primacy MKV4's.

At least that is what I have read..:)
 

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08 CTS, 06 C6 Vette
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the tires on the base car are P235/55R17 H-rated Michelin ALS Primacy MKV4's
The AWD gets P235/50R18 V-rated ALS Primacy MKV4's.

At least that is what I have read..:)
According to the latest Motor Trend, the base car has P235/55HR17 Michelin MXV4 tires (tire package QCH). The Y42 All Season Tire Package has P235/50VR17 (tire package QKE). The Y43 Syummer Tire Package has P235/50ZR17 (tire package QUR). Not sure of the Michelin designation on the V and Z tires. As I understand, the AWD tires are tied to the tire packages and not the AWD package.
 

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2008 CTS AWD FE2 DI 304hp
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Y43 Summer Tire Package has P235/50ZR18
Y42 winter tire package same size as above but all season design.
 

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2011 SRX & 2010 Corvette Grand Sport Convertible
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Here's the paragraph from the media.gm.com page regarding the tires used:

"The 2008 CTS features standard 17- by-8-inch aluminum wheels paired with Michelin H-rated (P235/55R17) all season-radials. The optional performance suspension includes an 18- by- 8.5-inch wheel with the all-new Michelin Pilot Sport 2 (P235/50R18) tire that can either be V- or Y-(summer) rated."

Taken from: http://media.gm.com/ca/gm/en/releases/2007/03-30-2008 Cadillac CTS.htm
 

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2011 CTS Coupe
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Chuck, I posted this info on another thread about the suspenssion types: Y-rated Michelin Pilot Sport PS2 235/50ZR18 97Y with FE3 / Summer Tire, V-rated Michelin Pilot HX MXM4 235/50VR18 97V with FE2 suspension.
 

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Discussion Starter #13 (Edited)
Chuck, I posted this info on another thread about the suspenssion types: Y-rated Michelin Pilot Sport PS2 235/50ZR18 97Y with FE3 / Summer Tire, V-rated Michelin Pilot HX MXM4 235/50VR18 97V with FE2 suspension.
Just the info I was looking for, thanks.

edited to add: I just checked the Tirerack review. Looks like consumers do not like the Pilot HX MXM4 at all. It's especially poor in winter conditions (similar to the RS-A).
 

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Just the info I was looking for, thanks.

edited to add: I just checked the Tirerack review. Looks like consumers do not like the Pilot HX MXM4 at all. It's especially poor in winter conditions (similar to the RS-A).
I noticed that too. At $235 each you'd think they'd do better than that. I wonder how long they will last?
 
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