[MBZ] speed ratings of tires

2009-02-08 Thread Kaleb C. Striplin
On, for example, a 140 300SD, tirerack says min speed rating is H=130 
mph.  Why do you need a tire rated that fast?  The car is never going to 
go anywhere near that fast.  It really narrows down the selection and 
raises the price.  Why cant a T=118mph tire be used?  That opens up alot 
more tire choices at cheaper prices.  This same thing could also be said 
for 124's 126 and so on.

--
Kaleb C. Striplin/Claremore, OK
 95 E300, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL,
 89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2,
 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D,
http://www.okiebenz.com

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread OK Don
My guess (and that's all it is - a guess), is that higher speed rated tires
have stiffer sidewalls, and handle higher temps. A heavier car will need
stiffer sidewalls, and will generate more heat while driving.  Then again,
the cars were designed for the autobahn 

On Sun, Feb 8, 2009 at 5:38 PM, Kaleb C. Striplin ka...@striplin.netwrote:

 On, for example, a 140 300SD, tirerack says min speed rating is H=130 mph.
  Why do you need a tire rated that fast?  The car is never going to go
 anywhere near that fast.  It really narrows down the selection and raises
 the price.  Why cant a T=118mph tire be used?  That opens up alot more tire
 choices at cheaper prices.  This same thing could also be said for 124's 126
 and so on.
 --



-- 
OK Don
W124 Diesels
Ubuntu 8.10
KD5NRO
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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Mitch Haley

Kaleb C. Striplin wrote:
On, for example, a 140 300SD, tirerack says min speed rating is H=130 
mph.  Why do you need a tire rated that fast? 


I think it's because they don't want to be blamed for selling you a tire with a 
lower rating than OEM. What do Altimax HP cost in that size?


Mitch.

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Kaleb C. Striplin
The HP's which are a H rated tire cost 84 in that size, the RT which is 
a T rated tire is 75


Mitch Haley wrote:

Kaleb C. Striplin wrote:
On, for example, a 140 300SD, tirerack says min speed rating is H=130 
mph.  Why do you need a tire rated that fast? 


I think it's because they don't want to be blamed for selling you a tire 
with a lower rating than OEM. What do Altimax HP cost in that size?


Mitch.

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--
Kaleb C. Striplin/Claremore, OK
 95 E300, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL,
 89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2,
 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D,
http://www.okiebenz.com

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Tom Hargrave
Kaleb,

Speed rating is about a lot more then speed. Speed rating also affects how
the tires handle. H rated tires have much stiffer sidewalls than S rated
tires and since the tires are an active part of a car's suspension,
downgrading from H to S rating, particularly the front tires, will have a
negative impact on how the car handles. Downgrading also greatly reduces
front tire tread life because the more flexible sidewalls allow more tread
to be scuffed off in turns.

Every used Mercedes I've bought to date came with S rated tires (except for
the 59, which had bias ply) and I replaced the front tires with the correct
H rated tires as soon as I could. Then I replaced the rear tires as soon as
they wore out. In every case, the correct front tires had a huge impact on
handling and I could tell no difference with the rear tires

BTW, Wal-Mart - the largest tire dealer in the world, does not even carry H
rated tires. And they told me that H rated tires are a waste of money
because no-one drives that fast. But the same Wal-Mart auto technician
will sell you the wrong battery for your Mercedes diesel and insist that
it's correct! What else would you expect from Wal-Mart?

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924
 

-Original Message-
From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com]
On Behalf Of Kaleb C. Striplin
Sent: Sunday, February 08, 2009 5:38 PM
To: mercedes Mailing List; davesl...@okiebenz.com
Subject: [MBZ] speed ratings of tires

On, for example, a 140 300SD, tirerack says min speed rating is H=130 
mph.  Why do you need a tire rated that fast?  The car is never going to 
go anywhere near that fast.  It really narrows down the selection and 
raises the price.  Why cant a T=118mph tire be used?  That opens up alot 
more tire choices at cheaper prices.  This same thing could also be said 
for 124's 126 and so on.
-- 
Kaleb C. Striplin/Claremore, OK
  95 E300, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL,
  89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2,
  84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D,
http://www.okiebenz.com

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Allan Streib
I have Cientra tires on my 300D, they are an speed rating S and load
rating 90 tire, made in Mexico by BF Goodrich.  They were cheap, but
actually have better snow performance than the Michelin X1 tires I had
before these (had to replace them because the bands were separating).

I don't think I've ever really driven more than 80MPH, maybe slightly
more when passing but certainly not for any extended period.

I'm not endorsing this as adequate, but I've not had ANY problems with
these tires and they seem to be wearing well.

Allan

Kaleb C. Striplin ka...@striplin.net writes:

 On, for example, a 140 300SD, tirerack says min speed rating is H=130
 mph.  Why do you need a tire rated that fast?  The car is never going
 to go anywhere near that fast.  It really narrows down the selection
 and raises the price.  Why cant a T=118mph tire be used?  That opens
 up alot more tire choices at cheaper prices.  This same thing could
 also be said for 124's 126 and so on.

-- 
1983 300D

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Tom Savage

Tom Hargrave wrote:

Kaleb,

Speed rating is about a lot more then speed. Speed rating also affects how
the tires handle. H rated tires have much stiffer sidewalls than S rated
tires and since the tires are an active part of a car's suspension,
downgrading from H to S rating, particularly the front tires, will have a
negative impact on how the car handles. Downgrading also greatly reduces
front tire tread life because the more flexible sidewalls allow more tread
to be scuffed off in turns.


What he said.  A 140 is a pretty hefty car and flimsy tires do it no 
favors at all.  I just put Bridgestone Turanzas on my S420 and they're 
about the perfect tire for the car.  Much nicer than the Michelins they 
replaced, or the Contis or no-name POS tires on other 140s I've driven.


Expensive, but they have a 70k mile treadlife warranty which I expect to 
collect on (these cars chew up tires pretty quickly), as long as I go 
back to Firestone every 6,000 miles so they can rotate them and steal my 
metal valve stem caps (again).


Tom

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Peter Frederick
Because when some idiot steals it and drives it at 120 and a tire  
blows, YOU are liable for his injuries because you put tires on the  
car that weren't good enough for how fast it would go.


Peter

On Feb 8, 2009, at 5:38 PM, Kaleb C. Striplin wrote:

On, for example, a 140 300SD, tirerack says min speed rating is  
H=130 mph.  Why do you need a tire rated that fast?  The car is  
never going to go anywhere near that fast.  It really narrows down  
the selection and raises the price.  Why cant a T=118mph tire be  
used?  That opens up alot more tire choices at cheaper prices.   
This same thing could also be said for 124's 126 and so on.

--
Kaleb C. Striplin/Claremore, OK
 95 E300, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL,
 89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2,
 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D,
http://www.okiebenz.com

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Craig McCluskey
On Sun, 08 Feb 2009 19:44:47 -0600 Tom Savage tesav...@gmail.com wrote:

 ... as long as I go back to Firestone every 6,000 miles so they can
 rotate them and steal my metal valve stem caps (again).

Maybe you should take the valve stem caps off before you go there.


Craig

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread E M
From what I've read about the tires originally intended for use on the W140,
they were much softer and of higher performance.  Due to the weight and size
of the car, they wore very fast, and the US market just wouldn't got for an
expensive tire that had to be replaced every 10,000 miles or so.  The tires
were toughened up for extended mileage, and the cars top end was reduced
to compensate for the lower performance rubber.

Ed
300E

2009/2/8 Tom Savage tesav...@gmail.com

 Tom Hargrave wrote:

 Kaleb,

 Speed rating is about a lot more then speed. Speed rating also affects
 how
 the tires handle. H rated tires have much stiffer sidewalls than S rated
 tires and since the tires are an active part of a car's suspension,
 downgrading from H to S rating, particularly the front tires, will have a
 negative impact on how the car handles. Downgrading also greatly reduces
 front tire tread life because the more flexible sidewalls allow more tread
 to be scuffed off in turns.


 What he said.  A 140 is a pretty hefty car and flimsy tires do it no favors
 at all.  I just put Bridgestone Turanzas on my S420 and they're about the
 perfect tire for the car.  Much nicer than the Michelins they replaced, or
 the Contis or no-name POS tires on other 140s I've driven.

 Expensive, but they have a 70k mile treadlife warranty which I expect to
 collect on (these cars chew up tires pretty quickly), as long as I go back
 to Firestone every 6,000 miles so they can rotate them and steal my metal
 valve stem caps (again).


 Tom

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread Tom Hargrave
You are probably right. A friend of mine bought one of the high performance
5 series BMWs a few years ago and his tires only lasted 9000 miles. But the
issue wasn't the speed rating, it was the rubber compound. The tires on his
BMW were Z rated!

When he went back to the Stealership for new tires, they would only mount
the originals and they explained that the replacements also had no mileage
rating.

I don't remember what brand he went to but he found an American Z rated tire
that lasted 30,000 miles. The replacements also did not come with a mileage
warranty.

I have to admit - it is a very tight car, but the sidewalls on a Z rated
tire have almost no give.

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924
 

-Original Message-
From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com]
On Behalf Of E M
Sent: Sunday, February 08, 2009 9:17 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] speed ratings of tires

From what I've read about the tires originally intended for use on the
W140,
they were much softer and of higher performance.  Due to the weight and size
of the car, they wore very fast, and the US market just wouldn't got for an
expensive tire that had to be replaced every 10,000 miles or so.  The tires
were toughened up for extended mileage, and the cars top end was reduced
to compensate for the lower performance rubber.

Ed
300E

2009/2/8 Tom Savage tesav...@gmail.com

 Tom Hargrave wrote:

 Kaleb,

 Speed rating is about a lot more then speed. Speed rating also affects
 how
 the tires handle. H rated tires have much stiffer sidewalls than S rated
 tires and since the tires are an active part of a car's suspension,
 downgrading from H to S rating, particularly the front tires, will have a
 negative impact on how the car handles. Downgrading also greatly reduces
 front tire tread life because the more flexible sidewalls allow more
tread
 to be scuffed off in turns.


 What he said.  A 140 is a pretty hefty car and flimsy tires do it no
favors
 at all.  I just put Bridgestone Turanzas on my S420 and they're about the
 perfect tire for the car.  Much nicer than the Michelins they replaced, or
 the Contis or no-name POS tires on other 140s I've driven.

 Expensive, but they have a 70k mile treadlife warranty which I expect to
 collect on (these cars chew up tires pretty quickly), as long as I go back
 to Firestone every 6,000 miles so they can rotate them and steal my metal
 valve stem caps (again).


 Tom

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread E M
I used to run Yoko 008Rs years ago on my old 911.  While DOT legal for road
use, there was no wear rating on them.  If you got 5000 out of a set, you
were doing really well, and they didn't like to be cycled a lot, so while
the grip was fantastic, it would drop off with cycles.  The sidewall was so
upright and ridged, they probably inspired run flat tires. lol  Nothing
comes without a cost, and while they would hang on forever, when they did
finally decide to let go, there wasn't a lot of progression built into
them.  Woho, did you feel that coming Molly??? ;-) hee hee

Ed
300E

2009/2/8 Tom Hargrave tharg...@hiwaay.net

 You are probably right. A friend of mine bought one of the high performance
 5 series BMWs a few years ago and his tires only lasted 9000 miles. But the
 issue wasn't the speed rating, it was the rubber compound. The tires on his
 BMW were Z rated!

 When he went back to the Stealership for new tires, they would only mount
 the originals and they explained that the replacements also had no mileage
 rating.

 I don't remember what brand he went to but he found an American Z rated
 tire
 that lasted 30,000 miles. The replacements also did not come with a mileage
 warranty.

 I have to admit - it is a very tight car, but the sidewalls on a Z rated
 tire have almost no give.

 Thanks,
 Tom Hargrave
 www.kegkits.com
 256-656-1924


 -Original Message-
 From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com]
 On Behalf Of E M
 Sent: Sunday, February 08, 2009 9:17 PM
 To: Mercedes Discussion List
 Subject: Re: [MBZ] speed ratings of tires

 From what I've read about the tires originally intended for use on the
 W140,
 they were much softer and of higher performance.  Due to the weight and
 size
 of the car, they wore very fast, and the US market just wouldn't got for an
 expensive tire that had to be replaced every 10,000 miles or so.  The tires
 were toughened up for extended mileage, and the cars top end was reduced
 to compensate for the lower performance rubber.

 Ed
 300E

 2009/2/8 Tom Savage tesav...@gmail.com

  Tom Hargrave wrote:
 
  Kaleb,
 
  Speed rating is about a lot more then speed. Speed rating also affects
  how
  the tires handle. H rated tires have much stiffer sidewalls than S rated
  tires and since the tires are an active part of a car's suspension,
  downgrading from H to S rating, particularly the front tires, will have
 a
  negative impact on how the car handles. Downgrading also greatly reduces
  front tire tread life because the more flexible sidewalls allow more
 tread
  to be scuffed off in turns.
 
 
  What he said.  A 140 is a pretty hefty car and flimsy tires do it no
 favors
  at all.  I just put Bridgestone Turanzas on my S420 and they're about the
  perfect tire for the car.  Much nicer than the Michelins they replaced,
 or
  the Contis or no-name POS tires on other 140s I've driven.
 
  Expensive, but they have a 70k mile treadlife warranty which I expect to
  collect on (these cars chew up tires pretty quickly), as long as I go
 back
  to Firestone every 6,000 miles so they can rotate them and steal my metal
  valve stem caps (again).
 
 
  Tom
 
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Re: [MBZ] speed ratings of tires

2009-02-08 Thread ernest breakfield
as i understood it, the speed rating only relates to using the tire for 
some fixed period of time (70 minutes, or something like that) before 
cooling down completely; anything longer than that is over spec.
   if, like so many MBZ drivers do, you drive your car at highway speed 
or more for more than an hour or so at a time between complete heat 
cycles, you're probably better off with a tire that is speed rated to 
somewhat higher than the speeds you are likely to be traveling at. 
considering the possible consequences of tire failure at speed, doesn't 
seem like the place to save a few bucks.



cheers!
e


Kaleb C. Striplin wrote:
On, for example, a 140 300SD, tirerack says min speed rating is H=130 
mph.  Why do you need a tire rated that fast?  The car is never going 
to go anywhere near that fast.  It really narrows down the selection 
and raises the price.  Why cant a T=118mph tire be used?  That opens 
up alot more tire choices at cheaper prices.  This same thing could 
also be said for 124's 126 and so on.

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Re: [MBZ] speed ratings of tires

2009-02-08 Thread ernest breakfield

heh,... that's a trip in the Way-Back Machine!
   i once got over 10K miles on a set of A008Rs (or possibly A008RTUs), 
but it was because i had to make several thousand-mile-weekend trips 
downstate and back on them. actually seemed to me that they had gotten 
less grippy as they had gotten fairly baked, but it was hard to tell 
exactly because i was autocrossing the 'slush' series on them and 
several of those events were in the slop.



cheers!
e


E M wrote:

I used to run Yoko 008Rs years ago on my old 911.  While DOT legal for road
use, there was no wear rating on them.  If you got 5000 out of a set, you
were doing really well, and they didn't like to be cycled a lot, so while
the grip was fantastic, it would drop off with cycles.  The sidewall was so
upright and ridged, they probably inspired run flat tires. lol  Nothing
comes without a cost, and while they would hang on forever, when they did
finally decide to let go, there wasn't a lot of progression built into
them.  Woho, did you feel that coming Molly??? ;-) hee hee

Ed
300E

2009/2/8 Tom Hargrave tharg...@hiwaay.net

  

You are probably right. A friend of mine bought one of the high performance
5 series BMWs a few years ago and his tires only lasted 9000 miles. But the
issue wasn't the speed rating, it was the rubber compound. The tires on his
BMW were Z rated!

When he went back to the Stealership for new tires, they would only mount
the originals and they explained that the replacements also had no mileage
rating.

I don't remember what brand he went to but he found an American Z rated
tire
that lasted 30,000 miles. The replacements also did not come with a mileage
warranty.

I have to admit - it is a very tight car, but the sidewalls on a Z rated
tire have almost no give.

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924


-Original Message-
From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com]
On Behalf Of E M
Sent: Sunday, February 08, 2009 9:17 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] speed ratings of tires

From what I've read about the tires originally intended for use on the
W140,
they were much softer and of higher performance.  Due to the weight and
size
of the car, they wore very fast, and the US market just wouldn't got for an
expensive tire that had to be replaced every 10,000 miles or so.  The tires
were toughened up for extended mileage, and the cars top end was reduced
to compensate for the lower performance rubber.

Ed
300E

2009/2/8 Tom Savage tesav...@gmail.com



Tom Hargrave wrote:

  

Kaleb,

Speed rating is about a lot more then speed. Speed rating also affects
how
the tires handle. H rated tires have much stiffer sidewalls than S rated
tires and since the tires are an active part of a car's suspension,
downgrading from H to S rating, particularly the front tires, will have


a


negative impact on how the car handles. Downgrading also greatly reduces
front tire tread life because the more flexible sidewalls allow more


tread


to be scuffed off in turns.



What he said.  A 140 is a pretty hefty car and flimsy tires do it no
  

favors


at all.  I just put Bridgestone Turanzas on my S420 and they're about the
perfect tire for the car.  Much nicer than the Michelins they replaced,
  

or


the Contis or no-name POS tires on other 140s I've driven.

Expensive, but they have a 70k mile treadlife warranty which I expect to
collect on (these cars chew up tires pretty quickly), as long as I go
  

back


to Firestone every 6,000 miles so they can rotate them and steal my metal
valve stem caps (again).


Tom

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