If you'll read my message, you'll notice I didn't refer specifically to any
particular tire or rating. I also referred to a "stock" suspension---not
one set up for racing. I am not an expert, and merely passed along
information from a very reliable source about the *potential* for very
sticky, high-tech tires to cause problems with the stock suspension.
Anyone else, more knowledgeable than I, is welcome to comment.
Phil Haldeman
-----Original Message-----
From: Gernot Vonhoegen <gernot.vonhoegen@stir.ac.uk>
To: triumphs@autox.team.net <triumphs@autox.team.net>; 'Philip Haldeman'
<haldeman@accessone.com>
Date: Thursday, June 10, 1999 6:33 AM
Subject: RE: "S" rating on tires...
>Excuse me?
>I have seen a lot of racing TR6's with a lot stickier tyres than puny s
>rated tyres. Apart from that does the rating of a tyre say absolutely
>nothing about how sticky the rubber is. Compare yokohama 510's to
michelin,
>michelin last long, yokos don't yokos stick, michelins don't both ha ve
the
>same rating. The formulation in s rated tyres for 510's is the same as the
>one in the h rated ones.
>Cheers, Gernot
>
>> ----------
>> From: Philip Haldeman[SMTP:haldeman@accessone.com]
>> Reply To: Philip Haldeman
>> Sent: Thursday, June 10, 1999 3:06 AM
>> To: triumphs@autox.team.net
>> Subject: Re: "S" rating on tires...
>>
>>
>> My understanding is that the superior traction of the higher speed-rated
>> tires may damage the TR6 stock suspension, since it was not designed for
>> the suspension loads delivered by today's high-tech formulations.
>>
>> --Phil Haldeman
>>
>> -----Original Message-----
>> From: Shawn Loseke <SLoseke@vines.colostate.edu>
>> To: Philip Haldeman <haldeman@accessone.com>; triumphs@autox.team.net
>> <triumphs@autox.team.net>
>> Date: Wednesday, June 09, 1999 3:29 PM
>> Subject: Re: "S" rating on tires...
>>
>>
>> > An "S" rating is not to good actually (in my opinion). The base rating
>> is
>> >for top speed stability on a perfect tire. What they don't tell you
>> unless
>> >you ask is that the tire rating can also have an effect on handling and
>> >braking. Basically, the higher rated tires, will have superior traction
>> >over any tire with a lower rating.That traction includes the ability to
>> >stop your forward movement in the shortest possible difference, with
the
>> >smallest amount of drama.
>> > Lets get back to the "S" rated tires. They are rated for a top speed
of
>> >112mph. Now you might be thinking that since you don't regularly see
>> 112mph
>> >in your LBC, if at all. Why would you need a better tire? If you are
>> just
>> >using your car to cruise then you probably don't. In fact, these lower
>> >rated tires will generally last longer because they are made of a
harder
>> >rubber compound. Now if you like to play in the twisties every now and
>> >then. Then you will want a higher rated tire. Otherwise you will find
the
>> >handling limits of the tire long before you find the limits of your
car.
>> >Usually resulting in a stupendous example of understeer and you
>> >straightening the corner in the wrong direction.
>> > The tires that I have on my TR6 are "H" rated. This moves them up
into
>> a
>> >moderate performance category. For a good source of information, check
>> out
>> >www.tirerack.com . I also have slightly upgraded suspension. When I'm
>> on
>> >a race track, I can still reach the limit of the tire's adhesion before
>> the
>> >suspension bottoms from lateral load. But it is really close and really
>> >fun. Also, I have exceeded 112 mph. Just not on a regular basis.
>> > To sum up. If you enjoy spirited driving in your LBC. Higher rated
>> tires
>> >will increase your pleasure and safety. Both of which should be high on
>> you
>> >list.
>> >
>> >Shawn
>> >-------------
>> >Original Text
>> >From: "Philip Haldeman" <haldeman@accessone.com>, on 6/9/1999 12:21 PM:
>> >A 185R-15 tire ought to have an 80 profile (or be very close). British
>> >Wire Wheel lists the tires I mentioned as an "S" rated tire. This
would
>> >certainly be modern technology, though I haven't had hands-on
experience
>> >regarding the handling, per se. Perhaps someone else has and will let
us
>> >know. Our club member seems pleased. I forgot to mention that at
Tires
>> >Unlimited they are listed under "Spint Steel" but don't have a speed
>> >designation---so I've trusted British Wire Wheel on this. Also,
>> according
>> >to a table put out on the Triumph List in May, '98 by Brian Kemp, the
>> >closest size to the original tires, with the least speedo error, etc.
>> would
>> >be 195/75s rather than 205/70s. Yokohama makes an "S" rated tire in
the
>> >195/75-15 size. Not every tire store lists them, and putting Japanese
>> >tires on a TR6 may not be what everyone would want.
>> >
>> >--Phil
>> >
>> >
>> >
>>
>>
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