Run flat tires

[master1917]

Originally Posted by Tomaz

I used to run higher pressures, often at the stated limit. I probably got better gas milage and possibly tire wear. But it was at the cost of handling and comfort. At maximum pressure the contact patch is reduced resulting in less breaking and cornering limits and of course ride. I am willing to sacrifice wear for cornering and breaking.

Thanks Tomaz. You mean pumping them cold to the stated limit?

[Tomaz]

Originally Posted by master1917

Thanks Tomaz. You mean pumping them cold to the stated limit?

Yes, I don't do that anymore.

[master1917]

Just noticed a yellow sticker on the door seal stating 44psi if speed more than 100 mph. The regular sticker shows 38 as we know.

[Ralphhall]

I have a 2012 X5 5.0. I have Bridgestone 275 front and 315 rear run flat tires and I like them. It is a monster on the road, but likes it’s oil! I believe it is a “Sport” model and could it have an “M” suspension? Where can I run the vin to obtain a build sheet? That would tell me all of the options on the suv, correct?

[Bimmer360]

I used to hate run flats until I tried Pirelli Scorpions and the P Zero tires. Both are great and ride is the same when I had the non RF ones before. The only thing I dislike is the thread wear rating of 320AA. I put 500 miles a month or less anyway i guess it will last for a while.

[noelskii]

The sticker on my door says 32psi all around...would this be the same for RFT and non RFT?

I don't understand why all the stickers are different for these cars...they all use the same rim/tires....

I currently have non RFT in the front and RFT in the rear...

[master1917]

Swapped my summer wheels for my brand new run flat winter contact Continentals Contiwtntercontact SSR TS830P and love it! With 255/50/19 at belo 100km/hr they seem quieter and softer than my 20 inch non runflat summers Continelal sport! May be summers width (and lower profile) makes all the difference. Summers are a typical staggered 275/315 on 20s.

[montela1980]

Hmm. I got 255/55/18 runflat conti winter and i consider the ride to be harsh. Cant wait for summer to buy dunlop sport max 2 non runflat.
But also, the roads where i drive are horrible.


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[master1917]

Originally Posted by montela1980

Hmm. I got 255/55/18 runflat conti winter and i consider the ride to be harsh. Cant wait for summer to buy dunlop sport max 2 non runflat.
But also, the roads where i drive are horrible.


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May be your summers are taller and narrower than 20/315?

[montela1980]

Yes, they are and i still find the ride to be harsh. I wanted to go with 20s for summer, but i prefer comfort over the look


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