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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Tue Oct 12, 2010 10:30 am Post subject: Quality Control on Tires |
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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? _________________ 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. |
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Mike Fisher Samba Member
Joined: January 30, 2006 Posts: 17969 Location: Eugene, OR
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Posted: Tue Oct 12, 2010 11:31 am Post subject: |
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I've had truck tires that were so bad they shaved rubber off the tread to try and true them. _________________ https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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David Samba Member
Joined: June 29, 2004 Posts: 2027 Location: Raleigh, NC
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Posted: Thu Oct 14, 2010 2:44 am Post subject: Re: Quality Control on Tires |
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79SuperVert wrote: |
Adjusting the alignment doesn't help. Am I right in suspecting that tires are not as uniformly made as I would expect? |
You are right, and there are many issues that can arise. I'm researching new tires for my new car and finding out that this is a common issue.
It's probably an issue with Conicity:
http://en.wikipedia.org/wiki/Tire_uniformity#Conicity _________________ Cheers,
Dave
*October '54 Ragtop
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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Thu Oct 14, 2010 5:58 am Post subject: |
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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. _________________ 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. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Thu Oct 14, 2010 6:19 am Post subject: |
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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 _________________ 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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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Thu Oct 14, 2010 10:52 am Post subject: |
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I bought them by mail from Coker. _________________ 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. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Thu Oct 14, 2010 12:07 pm Post subject: |
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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 _________________ 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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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Thu Oct 14, 2010 1:25 pm Post subject: |
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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. _________________ 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. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Thu Oct 14, 2010 1:54 pm Post subject: |
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ok good luck, with use the tires may just scrub in... _________________ 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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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Thu Oct 14, 2010 2:47 pm Post subject: |
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Well, not with the whole whoppin' 3,000 miles I put on them a 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. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Fri Oct 15, 2010 5:19 am Post subject: |
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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 _________________ 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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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Fri Oct 15, 2010 7:40 am Post subject: |
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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. |
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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Sun Oct 17, 2010 4:14 pm Post subject: |
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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. |
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bugninva Samba Member
Joined: December 14, 2004 Posts: 8858 Location: sound it out.
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Posted: Sun Oct 17, 2010 5:07 pm Post subject: |
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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... _________________
[email protected] wrote: |
With a show of hands, who has built over 1000 engines in the last 25 years? Anyone? |
GEX has. Just sayin |
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79SuperVert Samba Member
Joined: May 31, 2002 Posts: 9758 Location: Elizabeth, NJ & La Isla Del Encanto
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Posted: Mon Oct 18, 2010 6:07 am Post subject: |
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Some roads in NJ are crowned, some are tilted, some are off-camber, some are in pieces. _________________ 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. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Mon Oct 18, 2010 7:45 am Post subject: |
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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... _________________ 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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