A question that sprang to mind in an idle moment....

I have noticed many of the tyre replacement shops use a typical setup
with a central compressor and receiver, feeding lots of fixed pipework
taking air round the workshop, and finally flexible hoses for the impact
drivers and other equipment that requires it. Many of these shops are
equipped with inline oilers toward the front end of the supply, such
that all the tools get an oiled air flow.

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after fitting?


--
Cheers,

John.

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On Fri, 17 Dec 2004 12:58:26 +0000, John Rumm
wrote:

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after fitting?

Not a problem. It was, once upon a time, but for decades now car
tyres have used compositions that are fairly insensitive to common
car-related fluids. They have to be - it's just not practical to keep
them separate.

However don't wear your best Ectomorph when you're doing an oil
change. Latex _does_ suffer if you get mineral oils onto it.

"John Rumm" wrote in message
...
A question that sprang to mind in an idle moment....

I have noticed many of the tyre replacement shops use a typical setup with
a central compressor and receiver, feeding lots of fixed pipework taking
air round the workshop, and finally flexible hoses for the impact drivers
and other equipment that requires it. Many of these shops are equipped
with inline oilers toward the front end of the supply, such that all the
tools get an oiled air flow.

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after
fitting?


--
Cheers,

John.

You should get your tyres blown up with nitrogen, many tyre places do this
nowadays, the advantages are inert with the rubber and the tyres don't lose
pressure so quickly.

mrcheerful

"mrcheerful ." wrote in message
...

snip
and the tyres don't lose
pressure so quickly.

Any basis for this in physics ? Air is mainly nitrogen, and oxygen has a
slightly higher molecular weight.

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

I'll get mine blown up with 79% nitrogen then.....!

mrcheerful . wrote:

You should get your tyres blown up with nitrogen, many tyre places do this
nowadays, the advantages are inert with the rubber and the tyres don't lose
pressure so quickly.

Nitrogen molecules are slightly smaller than oxygen molecules, so the
tyres would deflate slightly faster by diffusion if filled with nitrogen.

But you'll never notice the difference, a) because it's very small, and
b) because most deflation is through orifices, not diffusion.

As for nitrogen being inert, when was the last time you had to replace
your tyres because they had chemically degraded from the inside-out?


--
Grunff

"mrcheerful ." wrote in message
...

snip
You should get your tyres blown up with nitrogen, many tyre places do
this
nowadays, the advantages are inert with the rubber and the tyres don't
lose
pressure so quickly.


Yeh, like just fitting a K&N air filter and expecting a boost in the engines
BHP output...

It's all nothing but total bull*hit.

On 17 Dec 2004 08:32:28 -0800, "Phil"
strung together this:

I'll get mine blown up with 79% nitrogen then.....!

Pffft, I already do. I saw this as being an advantage over normal air
years ago......
--

SJW
Please reply to group or use 'usenet' in email subject

"Grunff" wrote in message
...
mrcheerful . wrote:

You should get your tyres blown up with nitrogen, many tyre places do
this
nowadays, the advantages are inert with the rubber and the tyres don't
lose
pressure so quickly.

Nitrogen molecules are slightly smaller than oxygen molecules, so the
tyres would deflate slightly faster by diffusion if filled with nitrogen.

But you'll never notice the difference, a) because it's very small, and
b) because most deflation is through orifices, not diffusion.

As for nitrogen being inert, when was the last time you had to replace
your tyres because they had chemically degraded from the inside-out?


is it not more to to with heat and tyre pressures thats why F1 teams use it
?

Peter

John Rumm wrote:

A question that sprang to mind in an idle moment....

I have noticed many of the tyre replacement shops use a typical setup
with a central compressor and receiver, feeding lots of fixed pipework
taking air round the workshop, and finally flexible hoses for the
impact drivers and other equipment that requires it. Many of these
shops are equipped with inline oilers toward the front end of the
supply, such that all the tools get an oiled air flow.

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after
fitting?


I think you will find that these devices are not oilers but traps to
prevent oil from the compressor getting into the air lines.
A

--


Regards

John


":::Jerry::::" wrote in message
...

"mrcheerful ." wrote in message
...

snip
You should get your tyres blown up with nitrogen, many tyre places do
this
nowadays, the advantages are inert with the rubber and the tyres don't
lose
pressure so quickly.

I suppose it saves the tyre establishment having to run, maintain and
inspect the air compressor.


John

"John" wrote in message
...
snip

[ re inflating tyres with nitrogen ]

I suppose it saves the tyre establishment having to run, maintain and
inspect the air compressor.

Hardly, unless they are running the tyre changing machines etc. on it to
!...

"Andy Dee" wrote in message
...
John Rumm wrote:

A question that sprang to mind in an idle moment....

I have noticed many of the tyre replacement shops use a typical setup
with a central compressor and receiver, feeding lots of fixed pipework
taking air round the workshop, and finally flexible hoses for the
impact drivers and other equipment that requires it. Many of these
shops are equipped with inline oilers toward the front end of the
supply, such that all the tools get an oiled air flow.

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after
fitting?


I think you will find that these devices are not oilers but traps to
prevent oil from the compressor getting into the air lines.

Not quite, normally air lines going to air operated machines / tools will
have both a *oil and water* trap and an oiler [1] but were clean air is
required there will be the oil and water trap but not always the oiler -
for really clean air there will also be a dehumidifier and other filters,
mostly used where air feed breathing masks are in use, such as paint shops
etc.

[1] there is a difference in the oil that can get into the air at the
compressor and the oil required to lubricate air operated equipment, thus
the need to remove one type of oil and introduce another IYSWIM.

Better still, get them blown up with helium.

As well as being inert, it makes the car lighter so saves fuel.
Had mine done last week at IMM Motors.

On 17 Dec 2004 11:17:51 -0800, strung together
this:

Better still, get them blown up with helium.

As well as being inert, it makes the car lighter so saves fuel.
Had mine done last week at IMM Motors.

Did they manage to find the wheels themselves or did you have to point
them out?
--

SJW
Please reply to group or use 'usenet' in email subject

In article ,
"Malcolm Stewart" writes:
"mrcheerful ." wrote in message
...

snip
and the tyres don't lose
pressure so quickly.

Any basis for this in physics ? Air is mainly nitrogen, and oxygen has a
slightly higher molecular weight.

You have to use it if you fitted oxygen free copper speaker cables,
gold plated fuse holders, etc...

--
Andrew Gabriel

On Fri, 17 Dec 2004 16:23:45 -0000, "Malcolm Stewart"
wrote:

Any basis for this in physics ?

Omitting the oxygen stops pyrolysis of the rubber if you have a thin
tyre mounted very close to a hot brake disk stack. Quite important
if you're a heavy aircraft.

For a domestic car, it's rubbish.

mrcheerful . wrote:

"John Rumm" wrote in message
...

A question that sprang to mind in an idle moment....

I have noticed many of the tyre replacement shops use a typical setup with
a central compressor and receiver, feeding lots of fixed pipework taking
air round the workshop, and finally flexible hoses for the impact drivers
and other equipment that requires it. Many of these shops are equipped
with inline oilers toward the front end of the supply, such that all the
tools get an oiled air flow.

However what is going to be the long term effect (if any) on the tyres
when they also use this oiled air supply to inflate the tyre after
fitting?


--
Cheers,

John.


You should get your tyres blown up with nitrogen, many tyre places do this
nowadays, the advantages are inert with the rubber and the tyres don't lose
pressure so quickly.

Well my Land rover tyres have never ever been inflated from new, and at
5 years and 50,000 miles are still doing well.

She may cost on diesel, but boy thats all she ever need bar filters and
oil changes...


mrcheerful