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325_driver

Are Run flat tyres really that uncomfortable?

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So, I'm thinking of putting a set of Eagle F1's 225/40/18s on my e91 BBS wheels.

I keep seeing reviews of people saying runflats create a horrible rid quality, whether its road noise, or not handling bumps in the road.

Are run flats really that bad / noticeable? Or is alot of this hyperbole.

I've had hf805 challenger run  flats on 16"s before, and can't say i noticed anything drastic.

Wondering whether anyone else has had experiences between RFT and non run RFT.

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HiFly Tyres are not a baseline of anything other than how cheap - let's allocate this decision to a used car lot to protect the guilty - the person paying the bill was!

There are many 'generations' of RFTs now, some are much better than others.

I've evaluated a few cars for purchase on RFTs and did not find them dreadful.  

Frankly if you're changing out of RFTs to conventional tyres *and* don't carry a spare, you're nuts.  Unless - say - you never leave the Auckland metropolitan area.  A blown out conventional sidewall will not be repaired by Tyre Goo when you're two days (or more) away from a replacement tyre.

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10 hours ago, Olaf said:

HiFly Tyres are not a baseline of anything other than how cheap - let's allocate this decision to a used car lot to protect the guilty - the person paying the bill was!

Car originally came with it on 16s, dunno if it was his decision or the mechanics decision 😅

I've been on conventional 225/40 non run flat, (potenzas) but always have a electronic tyre inflator but still doesn't remove my paranoia thus why I was wanting to go run flat.

They are eagle f1 assymetric runflat 225/40/18.

I just keep seeing alot of hyperbole about how horrible the ride quality is on run flats even high value tyres.

Thanks for your feedback anyway. Think I'll make the change any way, im sure Bridgestone eagle f1s can't be that bad.

Famous last words

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My tyre fitter recommends RFTs where the vehicle doesn't have a spare.

Unfortunately I've only driven on Bridgestone RFTs.  I've read that some of the Pirellis are great.  No idea about your GOODYEAR Eagle F1 RFTs... good for safety!

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i had a 120d with run flats.It had 205 55 16s or something like that.When i bought it it had two bridgestones and two continentals.I think the bridgestones wore out and i got two more continentals......the continentals were more compliant than the bridgestones.I never ever had any issues with grip of the tyres.Sometime later near xmas i needed to buy 4 new tyres....i couldnt get ANY.Later i did find some pirellis but they were expensive,but i had no choice.They were better again than the continentals.,I needed another two i think and this time they were much more reasonable in price.In this time i had a puncture (the tyre pressure sensors went off.I think it was down too 20psi.The tyre looked perfect.Tyre clinic wouldnt repair it.I drove maybe a kilometre at 80 km hr,then another couple of ks to a place to pump it up.It was a slow leak.

i would say they were slightly less compliant than the 235 45 17s i had on my e34.they were noiser on chip seal.The 120d was a hatch,and it had a huge battery (diesel) so there was really no room for a spare. 

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There's lots of 16/17/18 talk here, just be careful to hone in on your specifics. A runflat that feels fine on a 16" rim might very easily be intolerable on an 18.

 

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@M3AN i was thinking that, i may not have noticed it on 16" but maybe 18"s will get my attention

maybe the people that vlog / youtube about ride comfort from RFT are the type of people to be less tollerant about road noise.

I guess i'll find out soon!

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On 6/24/2020 at 6:53 AM, Olaf said:

Frankly if you're changing out of RFTs to conventional tyres *and* don't carry a spare, you're nuts.  Unless - say - you never leave the Auckland metropolitan area.  A blown out conventional sidewall will not be repaired by Tyre Goo when you're two days (or more) away from a replacement tyre.

That is so extremely rare and unlikely though, this is the "nightmare scenario" people make up to try to sell you on runflats. Not to mention the runflat probably wouldn't keep you going for those two days either in that situation. 

I've never experienced this and I've driven the entire country for work on multiple occasions. Considering how rare that is, if it does happen, just call up your roadside assist, have the car towed, use a rental for a couple days if you need to continue a roadtrip.

Cost savings, extra comfort and better handling you experience over your lifetime will make it totally worth it. 

Every puncture I've ever had has been manageable by pumping the tyre back up until I could get to a tyre shop. Have carried the tyre goo for years, still never needed to use it. 

If you have a flat tyre monitor like every BMW has these days since runflats were introduced, it'll warn you well in advance before the tyre goes totally flat. 

Keep in mind if you ever actually take advantage of it's runflat capability and drive on it, it's then f**ked and needs replacement as well... which is more expensive than just having the car towed! And since most of us will have some kind of roadside assist, the towing is free as well. 

Edited by Matth5

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My E46 came on Bridgestone RFTs (had style 261s on it).

When I got rid of them the new tyres were far more comfortable although sidewalls were less stiff (Hankook Ventus V12 Evo 2).

I did go from 215/40 in the front to 235/40 which would have helped as well.

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Cant compare 50/16 with 40/18. Will be totally different. Its like the difference between a innersprung bed and a firm futon..

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200,000+km without a spare and no rft.... call me crazy but never been stranded (and I go into the wops) 

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True story.... in 55 years of driving I have never ever had a flat tyre while driving or even been in a car with a flat tyre

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Ive had 2x punctured tyres at the same time once but that's it, terrible road works with low tread ain't a good combo. Still liike to have to spare, better to have it and not need it.

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I made the change from factory Bridgestone rft's on my 135i to PS4's and it was a night and day difference

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42 minutes ago, Navin said:

I made the change from factory Bridgestone rft's on my 135i to PS4's and it was a night and day difference

Thats a bit harsh on the Bridgestones, that's like comparing your 135 to an 1M, the 1M is going to win everytime 

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4 minutes ago, Gaz said:

Thats a bit harsh on the Bridgestones, that's like comparing your 135 to an 1M, the 1M is going to win everytime 

Was meaning in terms of comfort too not just performance, of course the PS4's are a far superior Tyre performance wise. The re050a's made the car feel crashy over uneven surfaces. Noticed a huge difference in comfort immediately and that was enough for me to be convinced. 

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2 hours ago, Gaz said:

Thats a bit harsh on the Bridgestones, that's like comparing your 135 to an 1M, the 1M is going to win everytime 

Except there's a massive price different on the 1M vs 135i, but those Bridgestone runflats are about as expensive as any performance tyre in NZ :P

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I got a 1" gash in the sidewall of a brand new (<100km) Eagle F1 255/35/18 on the harbour bridge from some random steel debris.

That made me sad.

Kept the tyre although I don't know why, what to do with it?

 

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8 hours ago, Jacko said:

200,000+km without a spare and no rft.... call me crazy but never been stranded (and I go into the wops) 

i wasn't going to say anything, until someone else did ... but that was me for atleast 10,000km

I atleast have a tyre pump in the boot now 😂

@M3AN What i find interesting, is the overwhelming number of people I hear mentioning about getting punctures on tyre review sites, all seem to be running Eagle f1's ....

Edited by 325_driver

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16 hours ago, Sammo said:

My E46 came on Bridgestone RFTs (had style 261s on it).

When I got rid of them the new tyres were far more comfortable although sidewalls were less stiff (Hankook Ventus V12 Evo 2).

I did go from 215/40 in the front to 235/40 which would have helped as well.

neither size is correct for an e46... this probably didn't help - you increased your rolling circumference from too small to too big (assuming 17's). if 18's you went from too big to bigger-er.  Hankooks seem to have soft sidewalls.

Edited by Olaf

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I had a flat tyre in a rental car, on an RFT, out past Takaka, just 2 years ago. 3.15pm.  Wife and kids with me.  Staying in Nelson.  I think we can agree that was in the wops.  There was no TPMS in the Commode, it felt odd so after a couple of cautious wiggles I pulled over to inspect it.  Fortunately the VF Commode had a spare tyre and the gear to change it.  Takaka Hill on a deflated RFT?  You must be joking.  I changed the tyre on the side of the road with large trucks going past, worked up a sweat, to the amusement of our kids.  We carried on, wondering how much Avis would screw me for a replacement.  It was better than the alternative.    

Imagine if it was my own car.  "Well, I hadn't had a flat since (last year, actually)... and I prefer the feeling of conventional tyres over RFTs, so I replaced the RFTs with these amazing conventional Michelins.  No darling, this car has no spare wheel.  Yes darling, I've already tried the tire slime.  I'll just walk down this road till I can find a phone signal, I'll be back as soon as I've contacted roadside assist.  Errr yes, we may need to ride in a flat-deck over the Takaka hill back to Motueka.  I'll try and get a motel room there.   Yes, I expect it'll be a few hours, and yes I know our daughter gets carsick.  It's all a bit of an adventure, eh?.  Yes kids, I'll need to rebook our ferry sailings; it could be a day or two to get this high-performance tyre size to Motueka.  What is there to do in Motueka?  I'm sure we'll find something to do.  Sorry kids, it's not the holiday we had planned.  Yes Darling, I'm sorry you'll need to contact work and let them know you'll be an extra couple of days.  Oh, you need to fly back for that meeting?  No, I understand you're not impressed, I'll manage the kids, and we'll find you a way to get to the airport".

YMMV.

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15 hours ago, B.M.W Ltd said:

True story.... in 55 years of driving I have never ever had a flat tyre while driving or even been in a car with a flat tyre

Awesome.  Buy a lotto ticket!  The odds are in your favour, Glenn!

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The same is true with anything mechanical though, I do have a can of tyre foam in the boot, never used it though.

Statistically, Id be much better off with spare waterpumps (2 of them, statistically), a spare starter motor, and spare brake caliper bolts to prevent strandings rather than a spare tyre. 

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4 hours ago, Olaf said:

neither size is correct for an e46... this probably didn't help - you increased your rolling circumference from too small to too big (assuming 17's). if 18's you went from too big to bigger-er.  Hankooks seem to have soft sidewalls.

18s - went from slightly too small to slightly too big. 

Correct is 225 40 18 but I wanted to fill the wheel arches a little more and go for a square setup hence the 235s.

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1 hour ago, Jacko said:

The same is true with anything mechanical though, I do have a can of tyre foam in the boot, never used it though.

Statistically, Id be much better off with spare waterpumps (2 of them, statistically), a spare starter motor, and spare brake caliper bolts to prevent strandings rather than a spare tyre. 

LOL true. The only thing that left me stranded far from home was the damn N55 charge pipe exploding! :D

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