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post #1 of 16 (permalink) Old 10-05-2009, 05:32 PM Thread Starter
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Tires

Ok my sis has an 05 cobalt and it has low pro pirelli tires on it and they are wearing down super fast!!! we have tried everything from different brand to rotating every oil change, but nothing helps! we recently looked into putting regular size tires on but the guy at the tires place said it wouldn't work due to the fact that the speedo would be off cuz the tires would be too big causing the car to go faster than the speedo says, im lookin to see how much the speedo would be off and if it is in fact possible to put the regular tires on! any help would be much appreciated
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post #2 of 16 (permalink) Old 10-05-2009, 05:36 PM
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Regular size tires will actually make the car go to the correct speed. I have 18" wheels on my LT and I am still right on at speed traps. I dont have any up or downs. I owuld recomend telling her to stop spinnin the tires... hahaha

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post #3 of 16 (permalink) Old 10-05-2009, 06:38 PM
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I have Toyo Proxy 4's and they have lasted about 2 years now and i will be getting new ones here soon. I dont know if thats any better but mine are worn cuz i hydroplaned one a.m. going to work


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post #4 of 16 (permalink) Old 10-05-2009, 07:31 PM
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Some more info would be nice...what size tires does she have and what size wheels? What Pirelli tires are they?

Give us some more info and we can give you some feedback.

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post #5 of 16 (permalink) Old 10-05-2009, 07:34 PM
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I noticed the same thing on my 08 Cobalt. I have Continental Touring Contact AS at a size of 195/60R15. I've kept my tires properly inflated and all. In a year and a half after 29000 miles I almost have drag slicks. I'm pretty pissed about that. But with that whole speedo thing, you can get your speedo recalibrated if you were to change your overall tire height. But to try and keep it the same you have to change the height of your rim to get more sidewall on the tire.

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post #6 of 16 (permalink) Old 10-05-2009, 09:00 PM
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I had the stock Contis on there, I'm assuming they got rotated, cause I had new rear tires when I got the car (I bought it used with 27k miles), but I had about 37.5k miles on those tires, and man was I scared to drive in the rain, hahaha.



I got some Yokohama AVID Touring-S tires for the front for $63 a piece at Discount Tire, and I like them so far.

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post #7 of 16 (permalink) Old 10-05-2009, 09:59 PM
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I bought my car in 07 w/ 12k miles on it...the tires were semi-decent when I bought it...they are the Conti touring as well...I have 33.5k miles now...I replaced them a few thousand miles ago with Bridgestone's listed in my sig...I never drove the Conti's in the winter either...I have Hankook winter Ipike tires...my guess is the tires had a total of 22-25k miles on them when replaced with new tires...they weren't completely gone, but I never drove them in the winter and hated driving in rain with them (even dry pavement sucked)...they are horrid tires and I can't believe they are considered all seasons.

I also had 2 nails in one tire within a couple months of buying the car and just put plugs in them and drove on it for 2 years...don't recommend that, but whatever. I'm extremely happy with the Potenza's though.

As for the OP...it sounds like your sis' car has aftermarket wheels? Since you talk about low profile tires...are the tires stock or not?

Check this link: Tire Size Calculator - tire & wheel plus sizing

You can input the stock size (or look up the car)...the stock size for 15" tires is 195/60 15 and for 16" it's 205/55 16. If the car 18's stock (SS/SC), I don't know what stock size is. It wouldn't have 17's would it? They didn't make an SS/NA in 05 did they?

Anyway, check your stock size against what you have now (if it's aftermarket) to see what the difference is or play with the numbers to see what you can do.

Here's a quick reference of what is generally used for each:
15": 195/60, 205/55, 205/60
16": 205/55, 225/50
18": 225/40, 215/40, 215/45, 225/45. 235/40

Hope this helps somewhat.

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post #8 of 16 (permalink) Old 10-06-2009, 06:04 AM
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Everything the above people said is right, could be the guy at the shop you talked to does not stock or does not want to mount the tires youare looking at. I have a set of BFGoodrich G Sports on mine and love them, but I have always had good luck with BFG's in the past when it comes to life and miles.
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post #9 of 16 (permalink) Old 10-06-2009, 06:34 AM
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Man i have like um 20K on my tires haha. I love my Toyos


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post #10 of 16 (permalink) Old 10-06-2009, 07:09 AM
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I'll second toyo's. Our lincoln has Toyo proxis t1r and they've been through 2 seasons so far with probably close to 40,000 miles on them and they're still great. He can roast the shit out of theses things to and they take it like a champ. Tons of tread left. We may replace the fronts next year only because when we lowered it the tire would grab the fender lip and drag it down then slice the tire. Other then that though they've been great. I actually just recently bought Toyo winter tires for my car.
I run BFG KDW's on my G5 they wear down much faster then the toyos but are also great tires.
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