[IK6SPEED]

Originally Posted by drF80

not sure?! What does that mean?

I drove on punctured/gash RFT for over 200 miles and could have probably done 200 more. It was your decision to assume it would not work as intended...

But glad to hear you're safe

It means he’s convinced himself that going to a non-RFT with no backup would have made no difference so he can rant on BMW instead of looking in the mirror.

[Zentan]

https://www.amazon.com/Slime-70005-S...ustomerReviews

Is this a good kit to buy?

[Billfitz]

As good as any, but read the fine print: Good for 500 miles. That's probably conservative, but still it's not permanent. You still need to plug the hole, so get a plug kit too.

[yoon_209]

Originally Posted by IK6SPEED

It means he's convinced himself that going to a non-RFT with no backup would have made no difference so he can rant on BMW instead of looking in the mirror.

I spoke with the tech at the tire shop and they said even if I had run flats it would have made no difference and I still wud have needed a tow...

they said it was real bad

[Wires]

In all fairness, in all the combined driving miles with everyone in this thread, how many of you have encountered a situation like this in the past 10 years of driving that destroys a tire beyond repair? I'm hearing crickets here....


I had one truck tire blow a sidewall for no reason 16 years ago, same truck had a lawnmower bolt go through the face requiring a boot to plug. But since that point, a minor nail hole every 5 years is all I see. I have no use for a spare, and just bought a good plug kit in case it happens again.

[upsidedownfunnel]

Originally Posted by yoon_209

I was 70 miles away from home... no way I wud have made it..

The limit on RFT tires is 50 miles at 50mph. You probably could have made it home if you had driven 35-40 mph. These limits are VERY conservative. I'm not condoning driving over 50 miles, but you could at least have driven halfway home to find a tire repair place along your route home.

It just sounds like you're making excuses why RFT would not have made a difference, when it definitely would have made a difference. If you made the decision to get non-RFTs, then you have to assume the responsibility for that decision. If you'd had RFT tires, you would have gotten much closer to home and driven yourself to a repair place.

Either way, you realize you're in a very unique situation. Sometimes S*** happens. BMW or any other company can't guarantee you'll be covered in any and all situations. This is such a first world problem.

[B58 parts]

By the way since adding the full size spare (heavy 400m 18x8) my mpg hasn't changed at all. It is weight so for sure it will not help mpg, but any diminutive effect is completely negligible.

I didn't want to bother with a donut due to brake clearance issues (mperf bbk is in the works) and the xdrive 1% tire diameter thing.

I _hate the stock wheels, super heavy, corroding .. junk. I'll probably get a second set of ARC8s .. and maybe even dedicated 2 spares summer/winter.

[IK6SPEED]

Originally Posted by YuminNuman

By the way since adding the full size spare (heavy 400m 18x8) my mpg hasn't changed at all. It is weight so for sure it will not help mpg, but any diminutive effect is completely negligible.

I didn't want to bother with a donut due to brake clearance issues (mperf bbk is in the works) and the xdrive 1% tire diameter thing.

I _hate the stock wheels, super heavy, corroding .. junk. I'll probably get a second set of ARC8s .. and maybe even dedicated 2 spares summer/winter.

50-55lbs is not going to change your MPG by any noticeable amount. If it did, your MPG would decrease as your kids grew up.

However, I much prefer having a “trunk” instead of 1/4 of a trunk.

[Cyanfall]

Originally Posted by yoon_209

I was 70 miles away from home... no way I wud have made it..

I drove 100 km with rft and 3 punctures on it before.

[Cyanfall]

Originally Posted by Wires

In all fairness, in all the combined driving miles with everyone in this thread, how many of you have encountered a situation like this in the past 10 years of driving that destroys a tire beyond repair? I'm hearing crickets here....


I had one truck tire blow a sidewall for no reason 16 years ago, same truck had a lawnmower bolt go through the face requiring a boot to plug. But since that point, a minor nail hole every 5 years is all I see. I have no use for a spare, and just bought a good plug kit in case it happens again.

I had once. Few years ago. somehow a manhole was missing a cover in the middle of the road and I drove through it. The tire exploded.

[Zentan]

Originally Posted by Cyanfall

I had once. Few years ago. somehow a manhole was missing a cover in the middle of the road and I drove through it. The tire exploded.

wow, what a dangerous situation it had been. you ran through it and you just heard a big BAM? i wouldve been scared af

[kern417]

It happens more often than people think. Especially if you get something in your sidewall and shops won't repair it. It doesn't have to be completely destroyed for you to need a new tire. The first time I bought a plug kit was when a shop turned me away due to the puncture location, so I went to autozone and plugged it myself.

And regarding the MPG, agreed you're not going to see a huge delta with a spare. But when BMW comes out with a new model, they'll have targets for weight, mpg, engine efficiency, etc. So some combination of those drives (and continues to drive) the need for runflats + no spare. In reality that's the heaviest and easiest component you can remove, so it's no wonder most OEMs are going that direction. Also leaves a lot more room for activities under the car.

[Coercion Shaman]

Like others have stated, my last three vehicles from other manufacturers (with the exception of my full size truck) did not have a spare. I did get an air compressor in two of them. Also added a plug kit to each and a compressor to the one that had nothing.

Also like folks have said, sometimes there just is no winning when it comes to tire damage. If you are buying a sealant kit, many now state they are 'safe' for TPMS.

[Billfitz]

Originally Posted by kern417

It happens more often than people think. Especially if you get something in your sidewall and shops won't repair it.

You can't safely fix a sidewall with either RF or non-RF. In the case of punctures that occur at highway speeds a goodly percentage of non-RF can't be fixed because by the time you bring the car to a stop the sidewall has been damaged. From that standpoint you're more likely to be able to fix an RF, so long as you don't continue driving on it, which will result in sidewall damage.

since adding the full size spare (heavy 400m 18x8) my mpg hasn't changed at all.

Your cargo space has. Eliminating the spare eliminates the need for a place to put it, allowing the car to be made that much smaller without sacrificing cargo space. That size reduction is the main source of increased MPG. That's why the full size spare was phased out by the compact spare, and the compact spare by the RFT.

[kern417]

Originally Posted by Billfitz

You can't safely fix a sidewall with either RF or non-RF. In the case of punctures that occur at highway speeds a goodly percentage of non-RF can't be fixed because by the time you bring the car to a stop the sidewall has been damaged. From that standpoint you're more likely to be able to fix an RF, so long as you don't continue driving on it, which will result in sidewall damage.

i know. i was responding to the post that claimed it rarely happens.

[Sea-Tac]

Originally Posted by yoon_209

Excuse my rant... but this whole no spare business is absolute BS...

On monday i drove over a ceramic shard that punctured through my right rear tire.

Yes I had non-runflats but no run flat would have survived this puncture. The puncture was two inches long from what it looks to be a roof tile of some sort and to top it off i was 70 miles away from home... i then had to be towed back home and my car has been sitting since I have to special order my 255/35/19 tire... what an absolute shit show...

Why did bmw think runflat tires would be smarter than adding a spare in the trunk???

Its total BS on car manufacturer's part-BMW and Porsche. They say its for saving weight and improving fuel economy...more BS...its all about money. It costs them less plain and simple to not supply a car with a spare tire.

Take spares out of a car, charge more for RF's that really do the same thing regular tires do except provide limited flat protection under very specific circumstances then make lots of advertising saying they are better and safer which creates a false sense of security on the part of the purchaser.

After spending three hours in the sun, thirty miles from nowhere Arizona with a door key stuck in my sidewall waiting for a BMW towI learned my lesson. I carry a 3 series spare in my trunk along with a small inflator and mobility kit and a plug kit.

Hind sight is always 20/20 so I ordered my X3 with the spare option...so much more piece of mind.

If you need info on the spare that I have, I have all the info and I'll post it up here if anyone wants it.

[Speedwell-Industries]

Originally Posted by Sea-Tac

Its total BS on car manufacturer's part-BMW and Porsche. They say its for saving weight and improving fuel economy...more BS...its all about money. It costs them less plain and simple to not supply a car with a spare tire.

Take spares out of a car, charge more for RF's that really do the same thing regular tires do except provide limited flat protection under very specific circumstances then make lots of advertising saying they are better and safer which creates a false sense of security on the part of the purchaser.

After spending three hours in the sun, thirty miles from nowhere Arizona with a door key stuck in my sidewall waiting for a BMW towI learned my lesson. I carry a 3 series spare in my trunk along with a small inflator and mobility kit and a plug kit.

Hind sight is always 20/20 so I ordered my X3 with the spare option...so much more piece of mind.

If you need info on the spare that I have, I have all the info and I'll post it up here if anyone wants it.

+1

Pretty soon cars won't even come with them anymore

[LMK5]

I can see a theoretical justification for RFTs, but not for premium cars. BMW and the like spend so much time and money lowering NVH and trying to create a premium driving experience that will separate themselves from the mass market brands. Then they go and top it off with RFTs that negate a good portion of that effort, in exchange for what? A very debatable advantage in a situation that is highly unlikely to occur. Just doesn't add up to me.

[Mashman]

Originally Posted by yoon_209

I was 70 miles away from home... no way I wud have made it..

As long as you kept it at 50mph or under, I don't think a RFT would have had any problem with the damage you had, and getting you home - it's pretty much what they are designed for. The 50 mile limit is pretty conservative, especially if you are running on the highway. It's happened to me, halfway between Houston, and Austin, and lost tire pressure. Got in the right hand lane, turned on the blinkers, and had no problems.

[IK6SPEED]

Originally Posted by LMK5

I can see a theoretical justification for RFTs, but not for premium cars. BMW and the like spend so much time and money lowering NVH and trying to create a premium driving experience that will separate themselves from the mass market brands. Then they go and top it off with RFTs that negate a good portion of that effort, in exchange for what? A very debatable advantage in a situation that is highly unlikely to occur. Just doesn't add up to me.

https://www.moderntiredealer.com/art...that-s-working

[LMK5]

Originally Posted by IK6SPEED

https://www.moderntiredealer.com/art...that-s-working

Thanks for the link--I've seen that article before. What BMW's Guerrero is saying is that providing for added convenience in an extraordinary situation takes precedence over providing a more premium driving experience each and every day. Doesn't sound like a good tradeoff to me or the majority of auto manufacturers.

[IK6SPEED]

Originally Posted by LMK5

Thanks for the link--I've seen that article before. What BMW's Guerrero is saying is that providing for added convenience in an extraordinary situation takes precedence over providing a more premium driving experience each and every day. Doesn't sound like a good tradeoff to me or the majority of auto manufacturers.

And they do not believe a premium stereo system is important either.

They shoot for the middle. Not the extreme.

He also states “Otherwise, Guerrero says run-flat tires rule. “All cars, all platforms, all series have a run-flat slot and they’re typically standard. But what we have are options. Especially in our most popular sizes there’s a requirement that it has to have a run-flat, and a non-run-flat with a spare. But the take rates for those non-run-flats are very small. Most BMW customers appreciate the service of run-flats and they leave it alone.” Guerrero says run-flat tires are a good fit for what he calls the BMW experience. ”