[chassis]

Originally Posted by XutvJet

Everyone keeps talking about "blowouts" but seriously, how many of us have experienced a blowout? I have never experienced one in my 30+ years of driving, my wife hasn't, and none of my close friends. The only people I know and/or have read about on the forums that have experienced blowouts are those with runflats hitting big potholes which tears the sidewall. If I had a car with low profile runflats, I'd definitely be worried about blowouts as it seems fairly common.

I have experienced multiple blowouts on RV trailer and boat trailer tires.

[bosstones]

Originally Posted by tturedraider

Interesting datapoint you chose. What manufacturers are you aware of that CPO any of their cars that are six years/72 months old? BMW doesn’t CPO cars over five years/60 months old and I’m not aware of any others that CPO cars older than five years.

Porsche will do up to 13yrs and 124k miles. Enrollment requires all MX to have been done by a Porsche-trained tech (although I assume they mean stealership, not a tech that was trained then spun off to an indy) + passing inspection. It's also transferrable if the car is sold through a stealership before the CPO expires. This was the case with my 2014 C4S. CPO on it expired last month.

[NSXR]

Originally Posted by BlkGS

Blow outs have nothing to do with tire age. Blow outs usually are caused by external forces (ie running over a mega pothole, running over some shit in the road, etc), and less frequently by inferior tires (usually from no name Chinese brands).

You're doing it again, telling me about all blow-outs. You simply can't know this, and shouldn't even be writing it.

[RockCrusher]

Originally Posted by tturedraider

Interesting datapoint you chose. What manufacturers are you aware of that CPO any of their cars that are six years/72 months old? BMW doesn’t CPO cars over five years/60 months old and I’m not aware of any others that CPO cars older than five years.

In June 2009 I bought a 6 year old Porsche 996 Turbo with <10K miles which came with a 2 year/100K mile warranty. It had brand new Continental tires fitted. The original tires -- with I'm sure plenty of tread left (the car was a garage queen) -- were removed as Porsche states (at least did then) high performance tires had a 6 year life.

[StradaRedlands]

Originally Posted by XutvJet

Everyone keeps talking about "blowouts" but seriously, how many of us have experienced a blowout? I have never experienced one in my 30+ years of driving, my wife hasn't, and none of my close friends. The only people I know and/or have read about on the forums that have experienced blowouts are those with runflats hitting big potholes which tears the sidewall. If I had a car with low profile runflats, I'd definitely be worried about blowouts as it seems fairly common.

I had a blow out... scared the hell out of me! Luckily it was a rear tire. I knew the tread was low, but I actually ran it to the steel belting. As soon as it wore through to that, something gave way. I was on the freeway, and BAM! Luckily right by my exit so just pulled off there. That was probably 25 years ago, so I was young and dumb (and quite poor).

[jkoral]

My OE tires on my M2 were 8 years old (probably a bit older from tire manufacture date). I just replaced them this year, fronts had tons of tread, rears were getting close. Still passed state inspection. Car lives inside garage (both home/work). I knew about the 6 year rule, but felt comfortable going a couple years longer, especially with so little mileage driven.

[No one]

Originally Posted by RockCrusher

In June 2009 I bought a 6 year old Porsche 996 Turbo with <10K miles which came with a 2 year/100K mile warranty. It had brand new Continental tires fitted. The original tires -- with I'm sure plenty of tread left (the car was a garage queen) -- were removed as Porsche states (at least did then) high performance tires had a 6 year life.

All the best at your expense. They could state 6 months (and charge you for 12 sets ) but that could be an overstretch. They are considerate, they care!

On a more serious side, it's not good if a car stands on the tyres (without rotating those) for prolonged time: they can deform (develop an uneven resilience) to some extent indeed.

[wrickem]

It’s a relatively inexpensive and simple peace of mind.
I change mine out after 4 years. I never come close to “getting my money’s worth out of my tires, but I always feel good with a fresh set.

[Ugly Kar]

I've always worn the tread down on my cars, but at 7 years my motorcycle tires were getting slippery to the point of being dangerous so it got new tires.

Carbon based products degrade over time, that's a fact. And the reason some recommend replacing all your engine hoses at 10 years. It wouldn't be worth the risk to me to drive a drivers car like a BMW with tires over 10 years old.

[Vindicator3]

Report back is that there are no visual signs of dry rot or degradation. We're going to replace them next time there's a good sale but she's not going to rush out and replace them immediately. They won't make it to age 7, though.

[shawnhayes]

This really isn't a reasonable debate. Tires degrade over time. The only debate is WHAT amount of time has to pass to replace. Okay, so THAT is a debate. But, on the losing edge of this debate, is tragedy....

https://rennlist.com/articles/paul-w...porsche-crash/

[No one]

Originally Posted by shawnhayes

But, on the losing edge of this debate, is tragedy....

https://rennlist.com/articles/paul-w...porsche-crash/

The losing edge is excuses are bullshit. Regarding careless driving as well.

[shawnhayes]

Originally Posted by No one

The losing edge is excuses are bullshit. Regarding careless driving as well.

Of course, but put that car on brand new tires, might not have happened. But that's all theoretical. We all know new tires are better than old. The question is when is the dropoff in performance over time? General agreement is five years. Might vary case to case. More than that is *unknown*. No one wants to do the data.

Shawn

[abdu]

i would be worried if they have dry rot or cracking otherwise you should be fine

[No one]

Originally Posted by shawnhayes

Of course, but put that car on brand new tires, might not have happened.

Don't worry, it would. There's no salvage from stupidity. My car runs on brand new tyres (run in) but they perform noticeably differently depending on the ambient air temperature: quite better when it's cool, not so much when it's warm (not hot yet!). And no, they aren't all-season officially, summer ones (Bridgestone Potenza S001). Run flat. The previous ones were the same model from 2013 and using them old and quite worn last season I didn't notice that. They could be predictably/reliably not so good.

[shawnhayes]

Originally Posted by No one

Don't worry, it would. There's no salvage from stupidity. My car runs on brand new tyres (run in) but they perform noticeably differently depending on the ambient air temperature: quite better when it's cool, not so much when it's warm (not hot yet!). And no, they aren't all-season officially, summer ones (Bridgestone Potenza S001). Run flat. The previous ones were the same model from 2013 and using them old and quite worn last season I didn't notice that. They could be predictably/reliably not so good.

Interesting choice. Have used Bridgestones in the past, and decent road tires. Not so great traction on track, but 280 treadwear what did I expect. But back to point, tires go bad, like fish in the refrigerator. Replacement is when not if.

Shawn

[Davil]

Originally Posted by Ugly Kar

Carbon based products degrade over time, that's a fact.

As do carbon based life forms.

[RockCrusher]

Originally Posted by No one

All the best at your expense. They could state 6 months (and charge you for 12 sets ) but that could be an overstretch. They are considerate, they care!

On a more serious side, it's not good if a car stands on the tyres (without rotating those) for prolonged time: they can deform (develop an uneven resilience) to some extent indeed.

Oh yeah. It's always the money grubbing dealer/factory.

The first owner drove the car on average nearly 1700 miles a year. He lived in the SF bay area and the car was garaged. So while tires can flat spot I doubt the tires were flat spotted and replaced for that reason.

I wasn't specifically charged for the tires. They were on the car when I bought it.

I will add while the car was listed for $62K and change I bought the car for $57K and change. This in June of 2009. New (in 2003) the car stickered for $119,000.

[BlkGS]

Originally Posted by shawnhayes

This really isn't a reasonable debate. Tires degrade over time. The only debate is WHAT amount of time has to pass to replace. Okay, so THAT is a debate. But, on the losing edge of this debate, is tragedy....

https://rennlist.com/articles/paul-w...porsche-crash/

That's bullshit. Paul died because he had a buddy with more ego and money than driving skills. Ego and showing off in a notoriously hard to handle car is what got Paul killed, not old tires.

[BlkGS]

Originally Posted by chassis

I have experienced multiple blowouts on RV trailer and boat trailer tires.

Most trailer tires have fairly low speed ratings that people don't follow. The (better than the average) tires on my boat trailer are rated for 80mph. The ones on my utility trailer are rated for like 45-55mph.

You pull a trailer at 85 mph down I95 like everyone where does and it's a 70mph tire or less and yes, it's gonna get hella hot and pop.

[No one]

Originally Posted by RockCrusher

I wasn't specifically charged for the tires. They were on the car when I bought it.

Of course they can't force a deal, that's how inclusion works. They must have counted every penny. If that were a gift they would've installed them explicitly/solemnly after you had shed a tear being told they loved your business so much. And all those gifts are something they long to get rid of as nobody buys.

Originally Posted by BlkGS

Most trailer tires have fairly low speed ratings that people don't follow. The (better than the average) tires on my boat trailer are rated for 80mph. The ones on my utility trailer are rated for like 45-55mph.

You pull a trailer at 85 mph down I95 like everyone where does and it's a 70mph tire or less and yes, it's gonna get hella hot and pop.

A very valid point! There's (must be) also a towing speed limit in the traffic rules/laws (as well as other specific considerations to follow). Apart from that my winter tyres have a restrictive speed limit (for the car's ability, way above the legal limit) that I did mind when I could go fast (now they put cameras everywhere). BMW recommends attaching a reminding sticker somewhere in your field of view in this case.

[XutvJet]

Originally Posted by BlkGS

Most trailer tires have fairly low speed ratings that people don't follow. The (better than the average) tires on my boat trailer are rated for 80mph. The ones on my utility trailer are rated for like 45-55mph.

You pull a trailer at 85 mph down I95 like everyone where does and it's a 70mph tire or less and yes, it's gonna get hella hot and pop.

^This. It's frightening to me how many people pull trailered loads that have no business doing so. I'm not saying "chassis" is that person, but so many don't understand that if your trailer doesn't have full size tires, they aren't designed for highway use.