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I got my volt brand new in march 2014 and today i have 9200km on it and when i visited my local tire store they measured the remaining thickness on the stock tire and they was really surprized to see my two front are at 6/32" and my two rear are at 9/32" tire after only 9000km !!!

I went to my GM garage and we measured the actual thickness on brand new 2014 Volt tires with like 5km on it and discovered that the thickness is about 10/32" when brand new.

Look like not a very thick tire...

Now i am wondering if it is NORMAL or not... i'm driving normally and the wheel alignment is perfect and tire have uniform thickness.

Good year specify these are guaranty for 105 000km including premature wear but this does not apply on OEM tire coming with vehicule .. Damn it !! and on the GM side they indicate that wear out is not covered!! so look like premature wear have NO warranty on teh volt?

any idea if it is normal to ahve 6/32 on the front after only 9000km ?

Thanks alot for your comments!

Doc
 

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The spec for the GM version of this tire is only 9/32", according to Tire Rack. Since the wear bar is at 2/32", losing 3/32" (of 7/32" useable) in only 9000 km (5600 mi) would seem to be a high rate of wear. Front tires do wear faster, but not that fast. You say you are driving "normally", but that doesn't tell us much. Normal around here can be quite aggressive. Do you keep your tire pressure at or above 38 psi?
 

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As bentbiker stated, 9/32" is the official spec. But if your gauge is reading 10/32" for new, then we'll use that for consistency sake.

So you have 1/32" wear in rear and 4/32" wear in front which averages to 2.5/32" for 5600 mi.

Since 2/32" is considered worn out (even though we all know tires are very dangerous by that point) we conclude your tires, if properly rotated, will last about 18,000 miles. (5600/2.5*8)

I've had high performance tires last only about 20,000 miles before, on a "sporty" 200hp front wheel drive car.

I am guessing you like to corner somewhat aggressively, many of your miles are city miles, and the tires aren't that great for long term durability. A trifecta leading to short tire life.

Sorry - but I think everything is "normal" here.
 

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I rotated the OEM tires on my 2014 Volt last month when the odometer hit 8k mi.
According to my digital tread depth gauge- wear was consistent on all four tires at 1/32".
I do keep inflated to 38psi and check regularly.

Here is my results from 9/13/2014..
Tread depths @ 38psi measured w/digital tread depth gauge with tires off the car:
Front right: 0.252" (8/32")
Front left: 0.252" (8/32")
Rear right: 0.264" (8/32")
Rear left: 0.257" (8/32")

Factory tread depth for Goodyear Assurance Fuel max 215/55 R17: 9/32"
Not too bad, 1/32" wear in 8k mi.
 

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I dunno, I still have 2 of the original tires on the rear of my 2011 after almost 69K miles. I would have all 4 except for 2 unrepairable punctures.
 

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I'm at 51k miles...

I rotate on schedule, keep the tires inflated to 40-42 psi. Maybe I drive "abnormal", haha.
 
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