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BMW 3-Series (E90 E92) Forum
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run flats to normal tyres
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01-24-2013, 01:04 AM | #23 |
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Run Flats also have much stiffer side walls which is why thet "crash" over bumps, cats eyes etc.
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01-24-2013, 02:35 AM | #24 |
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Plugs and a compressor aren't much use at 11pm at the side of a pitch black road are they though.
I think most people getting a flat, probably care more about getting home quickly and safely than they do about the cost of a new tyre, and certainly more than they care about sitting at the side of a road attempting a permanent tyre repair. |
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01-24-2013, 03:36 AM | #25 |
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I'd rather spend 5 mins on a quick fix which can later be repaired than spend £250 on a new tyre every time.
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01-25-2013, 05:39 AM | #27 | |
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fronts (225/40/18) yes, but not the rears
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02-23-2013, 06:19 AM | #28 |
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After much thought and reading on here - decided to replace my 4 run flats today with run flats! They are the bridgestone pontenza's. I understand these are the worst of the run flats however they didnt have any others in the garage.
I did order some conti contact 3's and went down today to get them swapped, but they didnt arrive (had to be ordered in) but they still had the RF's in the bridgstone, I basically couldnt be bothered to come back again and was 50/50 about swapping them for these but now im pleased that replaced with RF's. I did have some doubt in my head about changing to non-rf's, mainly getting a puncture and being stuck somehwere. This goo stuff didnt really appeal to me, so would prob would of got a spacesaver but even then would of been hassle to swap out + boot space. My old RF's were completely warn, was experiencing tramlining all the time - it was a horrible experience, mainly my fault for letting them get in such a state but since the new rf's the handling and response is so much better, maybe i forgot how the car should drive like... I like the firmness and contact you get with RF's - can be annoying when go over a pothole etc...but normal driving you dont notice it too much. So in a nutshell - would of prob of liked the of non-rf's as well but I know I would had that doubt in the back of mind about getting a puncture in the worst place/time. So overall Im pleased the conti's didnt arrive and stuck with the RF's - one less thing to worry about on those big drives! |
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02-23-2013, 01:51 PM | #29 | |
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02-23-2013, 02:18 PM | #30 | |
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02-23-2013, 04:03 PM | #31 |
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I made a move to non run flats recently. Absolutely love it.
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02-24-2013, 02:12 AM | #32 |
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Changed my 19" Bridgestone Run Flats to Conti Sport Contact 5's ride quality was an instant improvement, rides better over ridges and uneven roads doesn't squirm about over expansion joints or changes in surfaces like the RFL's did a bit quieter too in general day driving. A worthwhile change IMO makes a real difference.
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02-24-2013, 05:07 PM | #33 | |
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02-24-2013, 05:10 PM | #34 |
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I think BMW have gone after the money, like most people sadly do these days. Another example being that awful Top Gear show. Satisfying the majority i guess, which doesn't mean its right!
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02-25-2013, 03:39 AM | #35 |
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Hi guys, new to the forum and I have been debating this question since I bought my first BMW a few month back, already suffered from numerous cracks to my alloys which I have had to get welded but What I wanted to know is would moving to non RFT help with tyre absorbing the road rather than cracking the alloys
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02-25-2013, 04:03 AM | #36 | |
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But to be fair, BMW have never sat behind the crowd in developing technology, be it engines, safety, recycling, production systems, etc., even the ECO card coming to the fore. Therefore we do run into issues. I feel we have been guinea pigs with the run-flat tyre technology, and the E9x models were not really ready (for such a volume seller) for "non optional" RFT fitment. But they are getting there. F30/31 run so much better on RFTs. I remember talking with one of BMW's Technical Area Managers and he was clear BMW are commited to run-flats, it is the future, even if there is a bit more flexibility to which models can have them as options. BMW are pushing the run-flat technology for safety, they are clear it is one of the features many of their customers want, even if we detect flaws in the application. OK, it gives BMW flexibility in other design features, CO2 saving, etc., but the safety factor is a major driving force. I've had plenty of say about RFTs over the years, and removed them from my E91 330d, so know their limitation and characteristics. But must say running them on my 535i is not the same issue at all, compared to the 330d back in 2006. They are now acceptable, difficult to detect they are RFTs, most of the time, so will be keeping them for the safety and convenience. HighlandPete |
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02-25-2013, 05:02 AM | #37 |
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Thanks HighlandPete. You've changed my attitude with RFTs Re the F10. We are going to order one soon so glad to know it should be an improvement.
I just feel a bit wary with all this technology. I'm not saying its crap, its not, its great. It just feels that we are heading towards an inevitable future where cars will drive themselves. That would be a sad day. |
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02-25-2013, 06:28 AM | #39 | |
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On the F10 try and demo cars with and without VDC, to see what you think of refinement differences. VDC allows for a much wider working envelope with the obvious option modes. HighlandPete |
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02-25-2013, 07:25 AM | #40 | |
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Sorry to go off topic by the way OP. |
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02-25-2013, 09:43 AM | #41 | |
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HighlandPete |
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02-27-2013, 03:05 PM | #42 | |
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My 09 3 series had 19's and I believe they were fitted with original 08 so 2nd generation Bridgestone re050a run-flats on front that still had tread to pass BMW cpo the rears were new I drove to northern Michigan and back on them and to be honest they were rough but I imagine it was the gen 2 run-flats plus the age of the rubber they were dry and hard. Had BMW inspect them and they noticed being they were 3 yrs old there were very tiny almost unnoticeable dry rotting between the tread patches so they replaced them with 3rd generation run-flats which I happen to like a lot I got about 12,000 miles out of the rears 4/32 left (lots of spirited driving BMW had to change my oil twice under CBS in that 12K)and have much more on the front and I think I will go with P zero run-flats after this but I'm a big believer you have to check your tire pressure weekly and you can't under inflate a run flat tire i keep mine at 36.5 to 37 and 41.5 to 42 all the time using my trunk compressor anything less is gonna cause uneven and heavy sidewall wear This explains how far bridgstone run-flats have came since 2nd gen to 3rd gen tires. http://www.bridgestone.com/sc/runfla...ogy/index.html |
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02-27-2013, 04:44 PM | #43 | |
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As an example i recently purchased a new set of Goodyear Eagle Asymmetric 2 in a 225/40R18 size, arguably one of the best performance tyres on the market at the moment in Europe, and certainly better than anything that's come from Bridgestone in recent years. These were £103 each in non-runflat, and £187 each for runflats of the same tyre. Almost twice the price! People may get more miles from a runflat, but that can only come from a harder compound which means less grip, that's got nothing to do with whether the tyre is a runflat or not. The stock Bridgestone RE050A runflats that so many of us in Europe got on our E9x M Sport cars last for miles and miles, but the grip in the dry is poor and in the wet is abysmal - due primarily to the hardness of the compound. Sorry but i'd rather have grippy tyres, even if i have to replace them a little more often (and given the price difference they still work out more cost effective in the long run!).
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02-27-2013, 04:48 PM | #44 | |
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Think again.. |
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