Date: Fri, 22 Jul 2005 23:48:59 -0400
From: ma_twain <ma_twainnospamo.com>
Subject: Re: 9000CS Tire Selection Help


Dan RatherNot wrote: > "Pooh Bear" <rabbitsfriendsandrelationsnospamail.com> wrote in message > news:42DE46A3.51659C5Anospamail.com... > >>From the owner's manual the speed code is this... ( all maximum speed ) >> >> >>S = 180 kph - 115 mph >>T = 190 kph - 120 mph >>H = 210kph - 130 mph >>V = 240 kph - 150 mph >>Z = >240 kph - >150 mph >> >> > > I believe the codes are related to sidewall rigidity. Higher = more rigid > hence better (ie safer) handling at higher speeds. > > > The codes are related to how well the tires holds up to heat generated by the higher speeds, not necessarily related to sidewall rigidity. The tire requirements are specific to different handling packages on the model of the car. Tirerack said a H rated tire was correct for a 1993 Saab 900 turbo. The tire shop I went to would not install an H rate tire because I have a 1993 Commemorative Turbo 900 which was factory specified for a V rated tire. I know its terrible to have to drive a car like that, but I needed new tires, so I had to choose between a Cooper and the same model Michelin which was already on the car. I suppose I could get the H rate tires if I took the just the rims into the tire shop . . . So now I think about those expensive tires when I go into a turn - and I slow down :-( This takes some of the fun out it, but it does minimize the whining noise, from the passengers.

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