I use Pirelli P7 RFTs on my XDrive X1, Mike: 255/40 R18 on the rear, 225/40 R18
on the front. I had to change the rears at 26k, but only because I tow a
caravan. I changed the front nearside at 32k because of damage from the road
on the sidewall (?), but the front offside is still going strong (4mm tread) at
34k.
The grip is good, the noise about average and the rolling resistance similar.
It’s a firm ride because it’s an M Sport model, with corresponding suspension,
but I have no problem with the RFTs, no tramlining etc . . .
Chris
> On 25 Nov 17, at 22:43, Mike Gordon via olympus <olympus@xxxxxxxxxxxxxxxxx>
> wrote:
>
> Not sure there is anything really OT anymore but:
>
> The run -flat tires (RFT) on the 328 x-drive are getting old in more ways
> than one. They are expensive and are bone rattling when going over New Eng
> potholes and quite poor on snow. They do corner impressively well on dry
> roads. OEM tires which have been replaced at least once (225 45 R17 91H)
> are the ContiPro Contact SSR getting mebbe 25K out them if lucky. They have
> to have very stiff sidewalls in order to run flat and lead to the obvious
> drawbacks. I have needed the run flat once when it was 0 deg F out at 8:30
> PM leaving work and was glad to have it. There are no spares of any sort of
> course which is why the OEM are RFT.
>
> https://www.tirerack.com/tires/tires.jsp?tireMake=Continental&tireModel=ContiProContact+SSR&partnum=245HR7CPCSSR
>
> <https://www.tirerack.com/tires/tires.jsp?tireMake=Continental&tireModel=ContiProContact+SSR&partnum=245HR7CPCSSR>
>
> I ran across the below linked Bridgetone Driveguard RFT as replacements--less
> surface area on the road but as in lenses there are always compromises.
>
> https://tinyurl.com/yd6zmgza <https://tinyurl.com/yd6zmgza>
>
> I would even considerusing non RFT and carry a pump and some water soluble
> leak goo but didn't run into anything that was that much better but did not
> search exhaustively.. Don't really want to have to put on dedicated snows if
> at all possible.
--
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