Quality Control on Tires

79SuperVert · Posted: Tue Oct 12, 2010 10:30 am Post subject: Quality Control on Tires

This has happened to me with both VW and non-VW tires. Brand new tires get put on, and the car wants to go to one side. I switch the tires, and the problem disappears or the car wants to go to the other side. Adjusting the alignment doesn't help. Am I right in suspecting that tires are not as uniformly made as I would expect?
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Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

Mike Fisher · Posted: Tue Oct 12, 2010 11:31 am Post subject:

I've had truck tires that were so bad they shaved rubber off the tread to try and true them.
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David · Posted: Thu Oct 14, 2010 2:44 am Post subject: Re: Quality Control on Tires

79SuperVert · Posted: Thu Oct 14, 2010 5:58 am Post subject:

So I just put 4 new tires on my Beetle, and maybe I should just keep switching tires around until I get the best performance. I've already gone through three permutations, I guess I can do a few more next Saturday.

But when it happened on my minivan it wasn't so easy to just switch tires around. I wonder when this kind of inconvenience turns into a real safety hazard. Like that huge mess with Firestone tires a few years ago.
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Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

marklee · Posted: Thu Oct 14, 2010 6:19 am Post subject:

if the tyres are causing drag take them back to the shop and get a replacement. Could be a moulding issue, could be a storage issue, either way let the shop check alignment on their gauge to prove the tyres are at fault.Its dangerous and their responsibility to sell items fit for purpose
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79SuperVert · Posted: Thu Oct 14, 2010 10:52 am Post subject:

I bought them by mail from Coker.
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Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

marklee · Posted: Thu Oct 14, 2010 12:07 pm Post subject:

get a shop to check the alignment and get them remounted on the rims by them. Then get their manager to test drive the car and ask for his opinion. armed with this information e mail the suppliers and see what they come back with
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79SuperVert · Posted: Thu Oct 14, 2010 1:25 pm Post subject:

If I decide to return them that would be a good idea, but I can arrange the tires so that the drift is almost gone. Still, it shouldn't be there at all, and it has also happened to me on our minivan, so it's not just a Coker problem.
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Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

marklee · Posted: Thu Oct 14, 2010 1:54 pm Post subject:

ok good luck, with use the tires may just scrub in...
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79SuperVert · Posted: Thu Oct 14, 2010 2:47 pm Post subject:

Well, not with the whole whoppin' 3,000 miles I put on them a year! Laughing

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Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

marklee · Posted: Fri Oct 15, 2010 5:19 am Post subject:

how long were the tyres in storage? how old are they? date of manufacture markings on sidewall.Are the sidewalls flexible or have they gone hard? has the rubber cracked anywhere?

All this can affect on road performance of supposedly new tyres..

just a thought
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CGLI qualified motor repair tech
Qualified automotive Glass installer
Motor Insurance Repair and Research Centre,Thatcham, Advanced Vehicle Damage Estimator.
Police qualified vehicle examiner
Police Class 1 High performance, pursuit trained Advanced driver

79SuperVert · Posted: Fri Oct 15, 2010 7:40 am Post subject:

DOT code on all four of the Cokers indicate manufacture the first week of June of this year.
_________________
Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

79SuperVert · Posted: Sun Oct 17, 2010 4:14 pm Post subject:

I did more swapping yesterday and finally hit on a combination that has minimal (although still a tiny bit of) pull to one side. Drove it a lot today over twisty hilly roads as well as on the interstate and the tires worked fine.

But there's really no excuse for tires being off like that, especially at the prices they want for these limited - demand tires. Computer technology ought to be able to reduce the amount of variation from one tire to another to a statistically insignificant quantity.
_________________
Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

bugninva · Posted: Sun Oct 17, 2010 5:07 pm Post subject:

computer technology is all well and good, but your tires are formed in a heated mold under pressure... the computer only controls temperature and time.... that said, are the roads in NJ crowned? the more narrow the tire, the more a crown seems to affect the car...
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79SuperVert · Posted: Mon Oct 18, 2010 6:07 am Post subject:

Some roads in NJ are crowned, some are tilted, some are off-camber, some are in pieces. Smile

_________________
Central Jersey VW Society

Wanted: Art Collins VW (Savannah, Georgia) items - license plate surrounds and other items. Also ivory "AM", "FM" and "SW" buttons for a US Blaupunkt Frankfurt.

marklee · Posted: Mon Oct 18, 2010 7:45 am Post subject:

you are lucky, roads here are a novelty, the main roads and towns are ok but the villages and outlying districts are little more than dirt tracks...
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CGLI qualified body repair and refinish tech
CGLI qualified motor repair tech
Qualified automotive Glass installer
Motor Insurance Repair and Research Centre,Thatcham, Advanced Vehicle Damage Estimator.
Police qualified vehicle examiner
Police Class 1 High performance, pursuit trained Advanced driver


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