Re: "run-flats" (NAC, but definite car content)

["Karl Hoech" <kfhoech@domain.elided>]

I don't know much about run-flat tires; I always kind-of eyed them
suspiciously. However, my prejudice may well be unfounded and they may be
the neatest thing since sliced bread.

Regarding the H87 rating, it contains both load and speed rating. The 87
portion specifies the tire's capability to carry approximately 1200 pounds.
The H specifies the maximum speed rating, in this case 130 m.p.h.

The tech pages at TireRack.com contain a wealth of such information. See
http://www.tirerack.com/tires/tiretech/general/speed.htm and
http://www.tirerack.com/tires/tiretech/runflat/runflat.htm for more details.

Karl

----------
1969 Spider boat-tail, laid up in need of new clutch/flywheel


----- Original Message -----
From: "Tessie McMillan" <tessmc@domain.elided>
To: <alfa-digest@domain.elided>
Sent: Tuesday, September 17, 2002 7:13 PM
Subject: "run-flats" (NAC, but definite car content)


> OK, so I've signed up a bunch of my coworkers for our next Alfa club-
> sponsored Driving school. Especially for newer sedans, I've always
> encouraged folks to pump up the tire pressure about 10 psi over what
> they're used to driving (as long as they stay below the manufacturer's
> recommended maximum pressure!) to prevent tire roll-off under hard
> cornering. Well, one of my friends has a new-fangled car and sent me the
> following question, which I'm at a loss to answer:
>
> "My new car has "run-flat" tires on it, Eagle NCT 195/55 *H87* rated
> tires, maximum psi *51*. These tires are intended to run when flat and
> have a stiffer sidewall because of that. Do your recommendations to
> increase tire pressure to prevent tires rolling off the wheel in hard
> cornering hold for run-flat tires?"
>
> While I do know that even spanking new Porsches ship without a spare tire
> in the trunk -- merely a can of "fix-a-flat", I've never heard of
"run-flat"
> tires, or the H87 rating.
>
> Does anyone care to comment on this?
>
> Thanks!
>
> Tess
> --
> to be removed from alfa, see /bin/digest-subs.cgi
> or email "unsubscribe alfa" to majordomo@domain.elided
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided