Tire Replacement

Tony Johnson wrote:

 > I recently acquired a nail in one tire. Haven't determined if the tire is
 > repairable but in case it is not I want to learn what options what the tire
 > replacement options are. I understand uneven relative thread wear between
 > tires can be detrimental to the all-wheel-drive train and braking system.
 >
 > What are the tech specs regarding replacement of tires on an
 > all-wheel-drive Subaru Legacy sedan? Is there a thread wear differential
 > spec that would allow replacing less than all the tires, say only 2 tires or
 > perhaps 1 tire.
 >
 > Tony Johnson
 >
 >
How many miles are on the tires?

Is it only flat on the bottom?

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Blogging at <a style='text-decoration: underline;' href="http://HexagonalPeg.blogspot.com" target="_blank">http://HexagonalPeg.blogspot.com</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Tony Johnson wrote:

 > I recently acquired a nail in one tire. Haven't determined if the tire is
 > repairable but in case it is not I want to learn what options what the tire
 > replacement options are. I understand uneven relative thread wear between
 > tires can be detrimental to the all-wheel-drive train and braking system.

Yep.

 > What are the tech specs regarding replacement of tires on an
 > all-wheel-drive Subaru Legacy sedan? Is there a thread wear differential
 > spec that would allow replacing less than all the tires, say only 2 tires or
 > perhaps 1 tire.

I don't think there are any special requirements. Just get it
repaired to the Rubber Manufacturers' of America guidelines. It
needs to be taken off the rim to check for damage too severe to
repair. Always get it plugged to fill the area and patched to
properly seal the liner. A mushroom shaped plug/patch is ideal.

It will be a judgement call if the hole is too big or too close
to the sidewall. You might also need to get it rebalanced to
avoid uneven wear.

Is your's an auto - and what year? Some of the auto AWD systems
do a major freak-out if the tires aren't closely matched in size.
They have an electronically controlled transfer clutch that can
go batty working overtime if it senses the tires aren't spinning
at the same rate. The manual versions use a simpler mechanical
center diff.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

"Tony Johnson" <tonyjohnson.DeleteThis@cox.net> wrote in
news:llGle.4470$%Z2.624@lakeread08:

 > I recently acquired a nail in one tire. Haven't determined if the tire
 > is repairable but in case it is not I want to learn what options what
 > the tire replacement options are. I understand uneven relative thread
 > wear between tires can be detrimental to the all-wheel-drive train and
 > braking system.
 >
 > What are the tech specs regarding replacement of tires on an
 > all-wheel-drive Subaru Legacy sedan? Is there a thread wear differential
 > spec that would allow replacing less than all the tires, say only 2
 > tires or perhaps 1 tire.

From <http://www.subaru.com/common/faq/tech_info.jsp#4>

Do I have to replace all four tires on my AWD Subaru?

All of the tires on your AWD Subaru must be within 1/4 of an inch of rolling
circumference (part that touches the road). This is because of our All Wheel
Drive System.

Proper rotation of the tires at the appropriate service intervals will
increase the life expectancy of your tires. This will also ensure that all
four tires stay relatively equal in their tire tread wear. When vehicles are
serviced, tires should be routinely checked to ensure that the alignment and
tires are in good working condition.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Subaru states that tire circumference should be within 1/4 inch in
circumference which translates to about 3/32 inch difference in tread
depth on a 215/60/16 tire.(same size and model tires of course)
"Fuzzy Logic" <bob RemoveThis @arc.ab.caREMOVETHIS> wrote in message
news:Xns96638B27BE2D1bobarcabca@198.161.157.145...
 > "Tony Johnson" <tonyjohnson RemoveThis @cox.net> wrote in
 > news:llGle.4470$%Z2.624@lakeread08:
 >
  >> I recently acquired a nail in one tire. Haven't determined if the
  >> tire
  >> is repairable but in case it is not I want to learn what options
  >> what
  >> the tire replacement options are. I understand uneven relative
  >> thread
  >> wear between tires can be detrimental to the all-wheel-drive train
  >> and
  >> braking system.
  >>
  >> What are the tech specs regarding replacement of tires on an
  >> all-wheel-drive Subaru Legacy sedan? Is there a thread wear
  >> differential
  >> spec that would allow replacing less than all the tires, say only 2
  >> tires or perhaps 1 tire.
 >
 > From <http://www.subaru.com/common/faq/tech_info.jsp#4>
 >
 > Do I have to replace all four tires on my AWD Subaru?
 >
 > All of the tires on your AWD Subaru must be within 1/4 of an inch of
 > rolling
 > circumference (part that touches the road). This is because of our
 > All Wheel
 > Drive System.
 >
 > Proper rotation of the tires at the appropriate service intervals
 > will
 > increase the life expectancy of your tires. This will also ensure
 > that all
 > four tires stay relatively equal in their tire tread wear. When
 > vehicles are
 > serviced, tires should be routinely checked to ensure that the
 > alignment and
 > tires are in good working condition.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Try installing a tube in the tire when repairing. A nail can cause enough
damage so that the tire is unrepairable as a tubeless tire but quite okay
with the tube in. Save any mismatch with wear that way.
phil


"Tony Johnson" <tonyjohnson.DeleteThis@cox.net> wrote in message
news:llGle.4470$%Z2.624@lakeread08...
 >I recently acquired a nail in one tire. Haven't determined if the tire is
 >repairable but in case it is not I want to learn what options what the tire
 >replacement options are. I understand uneven relative thread wear between
 >tires can be detrimental to the all-wheel-drive train and braking system.
 >
 > What are the tech specs regarding replacement of tires on an
 > all-wheel-drive Subaru Legacy sedan? Is there a thread wear differential
 > spec that would allow replacing less than all the tires, say only 2 tires
 > or perhaps 1 tire.
 >
 > Tony Johnson
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Phil wrote:
 > Try installing a tube in the tire when repairing. A nail can cause enough
 > damage so that the tire is unrepairable as a tubeless tire but quite okay
 > with the tube in. Save any mismatch with wear that way.
 > phil

I would think that if you tube one tire you will want to tube all four.
Balance issues.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Tubes in radials create a safety issue due to friction between the
tube and the tire casing. The result is high heat and blowout. Any
tire web site will advise against it. ed
"Ragnar" <rworkss.RemoveThis@comsouth.net> wrote in message
news:GKWdnbr4kYMrHAXfRVn-rw@giganews.com...
 > Phil wrote:
  >> Try installing a tube in the tire when repairing. A nail can cause
  >> enough damage so that the tire is unrepairable as a tubeless tire
  >> but quite okay with the tube in. Save any mismatch with wear that
  >> way.
  >> phil
 >
 > I would think that if you tube one tire you will want to tube all
 > four. Balance issues.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

Edward Hayes wrote:

 > Tubes in radials create a safety issue due to friction between the
 > tube and the tire casing. The result is high heat and blowout. Any

But IF one decides to tube a radial, make sure it's a ~radial~ tube!
Most sold today are, but one must check. A non-radial tube won't last
for the reasons Ed mentions. There ARE apps where tubes in radials are
necessary, such as a buddy's wire wheels on his old Triumph Spitfire: no
problems so far, and the car's been restored and back on the road close
to five years. And I use tubes from 20" truck tires for a non-auto app:
they're radial tubes, so I guess they can hold up to some tough use.

  > > I would think that if you tube one tire you will want to tube all
  > > four. Balance issues.

To this poster: I'm afraid I don't understand what you're saying. A
tubed tire can be balanced as easily as a tubeless. Are you referring to
unsprung weight w/ one wheel heavier than the others? If so, I'd think
the small additional weight of a tube is probably close to being a
non-issue.

Rick<!-- ~MESSAGE_AFTER~ -->
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Rick Courtright wrote:
 > Edward Hayes wrote:
 >
 >
  >>Tubes in radials create a safety issue due to friction between the
  >>tube and the tire casing. The result is high heat and blowout. Any
 >
 >
 > But IF one decides to tube a radial, make sure it's a ~radial~ tube!
 > Most sold today are, but one must check. A non-radial tube won't last
 > for the reasons Ed mentions. There ARE apps where tubes in radials are
 > necessary, such as a buddy's wire wheels on his old Triumph Spitfire: no
 > problems so far, and the car's been restored and back on the road close
 > to five years. And I use tubes from 20" truck tires for a non-auto app:
 > they're radial tubes, so I guess they can hold up to some tough use.

But a tube wouldn't be needed in the OP's application if an industry
standard plug and patch is done. I don't believe tubes are in
common use these days.<!-- ~MESSAGE_AFTER~ -->
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y_p_w wrote:

 > But a tube wouldn't be needed in the OP's application if an industry
 > standard plug and patch is done. I don't believe tubes are in
 > common use these days.

Agreed--IF one can find a shop that does an "approved" plug AND patch
routine! I haven't seen it done in person for years, and I've picked up
enough nails to "keep track" as it were! If I had to establish what the
"industry standard" is simply from observation, it would be just a
patch... in the US, at least. I've heard (not documented) that the "plug
and patch" is required by law in many European countries--at least the
ones where they drive "fast" relative to the Americans. Anyone?

And you're correct on tubes--outside specialized apps, I'd guess they're
on the way to being an endangered species for automotive use.

Rick<!-- ~MESSAGE_AFTER~ -->
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Thanks Rick: I didn't know they made radial tubes.
"y_p_w" <y_p_w.RemoveThis@hotmail.com> wrote in message
news:T_1me.2218$MI4.651@newsread2.news.pas.earthlink.net...
 >
 >
 > Rick Courtright wrote:
  >> Edward Hayes wrote:
  >>
   >>>Tubes in radials create a safety issue due to friction between the
   >>>tube and the tire casing. The result is high heat and blowout. Any
  >>
  >>
  >> But IF one decides to tube a radial, make sure it's a ~radial~
  >> tube!
  >> Most sold today are, but one must check. A non-radial tube won't
  >> last
  >> for the reasons Ed mentions. There ARE apps where tubes in radials
  >> are
  >> necessary, such as a buddy's wire wheels on his old Triumph
  >> Spitfire: no
  >> problems so far, and the car's been restored and back on the road
  >> close
  >> to five years. And I use tubes from 20" truck tires for a non-auto
  >> app:
  >> they're radial tubes, so I guess they can hold up to some tough
  >> use.
 >
 > But a tube wouldn't be needed in the OP's application if an industry
 > standard plug and patch is done. I don't believe tubes are in
 > common use these days.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement 

you can do 1 of 2 things.
1 - get a new tire shaved down to the same size as the existing tires. A
race shop can do this, you better call around first.

2 - get 2 new tires. Put 1 new and 1 old on the front, and 1 new and 1 old
on the back. This will will minimize or eliminate driveshaft speed
differences between front and back. Side to side you don't have to worry
about because the differential will take car of that.
If you are going oval racing, put the two larger tires on the outside. )


"Tony Johnson" <tonyjohnson.RemoveThis@cox.net> wrote in message
news:llGle.4470$%Z2.624@lakeread08...
I recently acquired a nail in one tire. Haven't determined if the tire is
repairable but in case it is not I want to learn what options what the tire
replacement options are. I understand uneven relative thread wear between
tires can be detrimental to the all-wheel-drive train and braking system.
 >> Stay informed about: Tire Replacement 

 >
 > Agreed--IF one can find a shop that does an "approved" plug AND patch
 > routine! I haven't seen it done in person for years, and I've picked up
 > enough nails to "keep track" as it were! If I had to establish what the
 > "industry standard" is simply from observation, it would be just a
 > patch... in the US, at least. I've heard (not documented) that the "plug
 > and patch" is required by law in many European countries--at least the
 > ones where they drive "fast" relative to the Americans. Anyone?
 >
It's required by law in some states, for repairs
of emergency vehicles (fire/police/ambulance), if
the tire is repairable.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Tire Replacement