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Old 15 Oct 2012, 02:01 pm
Bob
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Default H and V Sped Rating On Tires

Hello,

Have a 2005 Accord, 6 cyl. Live in New England.

A general question re the H or V speed rating on passenger "all season"
tires:

Everything else remaining the same,is there any difference in
snow conditions, or on ice, for one rating over the other for the same
model tire ?

e.g., might the different compound in one be softer, and thus "a bit"
better on snow or ice ?

And, is the H or V for a tire usually embossed on the sidewall ?
Is there some code for, or is an actual H or V there (or somewhere) ?

Thanks,
Bob
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Old 15 Oct 2012, 04:57 pm
Elmo P. Shagnasty
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Default Re: H and V Sped Rating On Tires

In article <k5hmi6$rf6$1@dont-email.me>, Bob <rgsros@notme.invalid>
wrote:

> A general question re the H or V speed rating on passenger "all season"
> tires:
>
> Everything else remaining the same,is there any difference in
> snow conditions, or on ice, for one rating over the other for the same
> model tire ?


Those ratings have nothing to do with snow conditions or ice, or of the
tire's abilities therein. They are speed ratings, purely.

The rating is on the sidewall. Sometimes it's in the tire size itself.
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Old 15 Oct 2012, 06:19 pm
Douglas C. Neidermeyer
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Default Re: H and V Sped Rating On Tires

On 10/15/12 5:57 PM, Elmo P. Shagnasty wrote:
> In article <k5hmi6$rf6$1@dont-email.me>, Bob <rgsros@notme.invalid>
> wrote:
>
>> A general question re the H or V speed rating on passenger "all season"
>> tires:
>>
>> Everything else remaining the same,is there any difference in
>> snow conditions, or on ice, for one rating over the other for the same
>> model tire ?

>
> Those ratings have nothing to do with snow conditions or ice, or of the
> tire's abilities therein. They are speed ratings, purely.
>
> The rating is on the sidewall. Sometimes it's in the tire size itself.
>


And make sure the speed rating on the tires you buy is equal to or
faster than the OEM tire

--
"The first method for estimating the intelligence of a ruler is to look
at the men he has around him."
---Niccolo Machiavelli
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Old 15 Oct 2012, 06:53 pm
Tegger
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Default Re: H and V Sped Rating On Tires

Bob <rgsros@notme.invalid> wrote in news:k5hmi6$rf6$1@dont-email.me:

> Hello,
>
> Have a 2005 Accord, 6 cyl. Live in New England.
>
> A general question re the H or V speed rating on passenger "all season"
> tires:
>
> Everything else remaining the same,is there any difference in
> snow conditions, or on ice, for one rating over the other for the same
> model tire ?




No. "H" and "V" are maximum sustained speed ratings. They have nothing to
do with traction.


>
> e.g., might the different compound in one be softer, and thus "a bit"
> better on snow or ice ?




No. Speed ratings refer to the /carcass/ of the tire. Traction on ice is a
function of the /tread/.


>
> And, is the H or V for a tire usually embossed on the sidewall ?
> Is there some code for, or is an actual H or V there (or somewhere) ?



Yes. Take a close look aroud the sidewall of your tires. You will find a
number like, say, 225/55-R16 85H.

The "85" at the very end is the load rating, of no concern to you. The "H"
is the speed rating. That's the one you're asking about.

Automakers specify a speed rating that's compatible with the car's actual
top speed. If the vehicle is capable of 125mph, then they will specify a
tire of H-rating or higher. If you know you'll never, ever exceed 99mph,
then you're fine with Q-rated tires, which is the lowest speed rating for
ordinary passenger-car tires.

However, speed-rating does have a slight effect on handling, since higher
speed-rated tires have more flexible sidewalls, and the suspension will
have been calibrated with that in mind. You'll never notice a downgrade in
speed rating during ordinary driving, but you might during emergency
maneuvers.

And finally, some shops will refuse to install tires lower than the
vehicle's factory-spec, for liability reasons. If you run into that, you
have two options:
1) keep trying tire places until you find one that will do it, or
2) bring the wheels to them, OFF the car, and ask them to put the tires on
those wheels without telling them what car the wheels are from.


--
Tegger
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