GKGEIGER

The title says it. I don't even know if they are available in the correct sizes. I currently have them on my SL and can't tell the difference in them and regular summer performance tires. Might give some of us piece of mind.

hbear

okbarnett

I dont see much difference on my MB and i doubt if you can tell unless you do some very hi performance driving

Penn4S

From what I can see the highest speed rating for a run flat tire is "V" up to 149 mph max.
I don't drive to work at 149 mph but I would worry about compromise in handling vs N rated tires.
Never have used run flats on a Porsche nor would consider it.

StormRune

I switched from run-flats to normal tires on my prior Corvettes and the difference in ride quality was dramatic better with the non-run-flats. That was a few years ago and maybe they got better, but I still wouldn't touch a run-flat again.

Needsdecaf

drcollie

Run Flats are heavier, and to Porsche that's a non-starter as its unsprung weight....Verboten! Sidewalls are much stiffer, they're a PITA to mount. They are more costly. They tend to age poorly near the last 1/4 of the tire life.

If you're the kind of guy who enjoys wearing a condom during sex - then by all means get runflats for your Porsche.

Bob Z.

They are not called "Run-craps" for no reason...don't do it.

81911

Sounds like MB or BMW is more your speed.

koala

That's a hard no from me

kuma1416

Ultimately whether or not to go with RF tires depends on your priorities and risk tolerance. You will sacrifice some "performance"- they do weigh a lot more than non RFs, but having driven both, I don't notice much difference as a DD cruising on the highway or turning into the grocery store. They are very difficult to mount and remove (eg swapping for snows) and cost a lot more. Not uncommon to get scratches on your rim when changing them out. AFAIK, there are no RF available anywhere close to the 991.2 size, but I may be wrong. Having said this, I love them on my BMW. RFs were standard equipment on most BMWs up until recently so the suspension was tuned for the stiffer sidewall. The ride is silky smooth. I suspect most of those who noted a harsher ride with RFs are in cars where nonRFs were OEM. If you live in a very rural area like me where getting a tow can take hours and cell phone reception is patchy, (and don't have a spare in the trunk) then RFs can be a life saver esp in wintertime.

GKGEIGER

Geese, you guys are tough. I had a feeling I'd get this kind of response. Everything that has been said I know. I really don't need anyone else to tell me why not to do it, but if someone has actually installed a set, I'd like to talk to them.

P.S. These things are far better today then they were when they first came out.

Bob Z.

I think the answer to your question for now is no, but they might give "you" some piece of mind.

garfunkle

I recently bough a 650 Sport Gran Coupe.... It came with runflat, dunlaps, ultra performance summer tires. The sidewalls were so hard that any abnormality in the road felt like you hit a curb full speed. It scares everyone in the car Went from 275/25/20 & 245/30/20 to 275/30/20 & 245/35/20 in a Michelin Pilot Sport A/S non runflat. I did go up on the sidewall so its not completely fair but the ride is so much better and quieter. Grip improved in every scenario except for hot dry days but since this is an all year + rain car. Anyway - runflats are available but they are AWFUL.

GKGEIGER

If you drove my SL you wouldn't know that it had run flats. With that said, lets put this topic to bed.