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08-17-2010, 07:28 PM | #23 |
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Caranddriver. com with the TireRack tested summer tires in July 2009 including Potenza 760 using BMW 328i.
Check out the link: http://www.caranddriver.com/reviews/...mparison_tests |
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08-18-2010, 07:34 PM | #24 |
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Without reading any of the other posts here, I gotta say most likely its just a shit tire for this car. Do your research on tirerack PLEASE. Dont know how the hell anyone buys tires without doing so, otherwise id just feel like a random dummy driver going to a local tire shop n saying "i need new tires, what do ya have for me??"
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08-18-2010, 08:37 PM | #25 | |
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If you look at BMW's recommendation, they do indeed recommend that high of a pressure for those who drive sustained highway speed. There is no feeling of riding on the center of the tire. 40psi is not enough to balloon the tires as you say. You can even visually see that the tires flatten quite nicely on the tread. Most of my driving is commuting on highway so the higher pressure works great, and increases longevity. In the winter I drop them down a few psi to get a bit more bite in the snow. I have Conti DWS on my 135i. |
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08-18-2010, 08:41 PM | #26 | |
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The RE760 ranks #1 in it's category, and ranked #2 in a tirerack test. The problem was the stupidly low tire pressures the shop put in the tires. Those low pressures will easily make a cars handling feel sluggish and sloppy as the sidewall is flexing like crazy. He pumped the pressure up and they felt a lot better. |
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08-18-2010, 09:57 PM | #27 |
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Cool. Well all I saw was those tires def rated lower in every category vs the Conti's, specially treadwear and wet performance AND overall satisfaction.
I made a choice based largely off of those reputable reviews as well as what ive seen. Never been happier with a tire. |
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08-18-2010, 11:54 PM | #28 | |
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The only thing that really has annoyed me with my 135 is that I have had to do a lot of suspension rengineering due to the runflats. I have found it strange that it has taken all this work to make my 135 feel like my 330 ZHP did stock. BMW makes the M cars with out runflats for a reason and these cars are some of the best handling cars in the world. You can search and will find many post on the above upgrades and the benefits. It is not just the tires, infact with the above inprovements you might really like them. |
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08-19-2010, 08:40 AM | #29 | |
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To the OP most people has covered the important points and you'll find that having the pressure up will make a huge difference. I am now settled with 40F/38R and I have Pirelli's PZeros (not Rosso/Nero). I have done 25000km but it's about time for me to change tires, so durability is not that much of an issue, but I know there is another fellow member who changed at 13000km. RFT has much harder side walls and for some reason BMW made the suspension settings much series much softer (which is not the case in the 3ers). Having softer sidewalls gives more bodyroll, but the non-RFT gives superior grip, superior ride and milage, which way over compensate with the bodyroll. It only takes a bit of learning to control that bodyroll. I will take the non-RFT over the RFT any day. Have it a bit longer, but if you want to change it to one which has a stiffer sidewall.
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08-19-2010, 08:56 PM | #30 |
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The only thing that really has annoyed me with my 135 is that I have had to do a lot of suspension rengineering due to the runflats. I have found it strange that it has taken all this work to make my 135 feel like my 330 ZHP did stock. BMW makes the M cars with out runflats for a reason and these cars are some of the best handling cars in the world. You can search and will find many post on the above upgrades and the benefits. It is not just the tires, infact with the above inprovements you might really like them.[/QUOTE]
A big amen to that! With switching to the BMW Performance Susp. and buying non-runflats I've spent over $3k just to get my ultimate driving machine to drive right. And again, this is not the sort of thing you are likely to discover on a test drive, unless you are Ferris Bueller's parking attendant. This is likely to be my last BMW as long as they stay with the RFT's. |
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08-21-2010, 02:52 PM | #31 | |
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While I can't comment on how non-runflat are, I like how my car handles with the pzero runflats. The cornering is really crisp, I'm worried I'll lose that in a non-rft. |
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08-21-2010, 05:15 PM | #32 | |
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Running 18 RFTs will never get you to the ultimate drive on street or track. |
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08-21-2010, 05:49 PM | #33 | |
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FWIW, my current air pressure is 35/38 psi f/r, the way it came when I took delivery from the BMW Performance Center in SC. pge |
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08-21-2010, 07:52 PM | #34 | |
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BMW, you were able to get 1 happy customer with RFTs. Congratulations.
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08-21-2010, 08:14 PM | #35 | |
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To tell the truth, my DD is an 18 year old Maxima SE whose suspension feels like it's welded to the chassis since it's still all OEM, so the 1-er rides and drives like a dream. pge |
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08-21-2010, 11:13 PM | #36 | |
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On the highway the car pogoed and always felt like is was in a strong crosswind. It was a toss-up for me as to either get rid of the car or try to make it better. |
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08-22-2010, 10:21 AM | #37 | |
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It's good that RFT's can save you in the event of a catastrophic blowout at highway speed, but, i forget the source, the vast majority of these events have occured with non-rfts because don't pay any attention to their tire pressure whatsoever. I doubt most people even have a tire gauge in the car. They drive around with a chronically under inflated tire until the sidewall finally give. So, i think the RFT is really trying to address tire problems of those who are completely ignorant or refuse to do the simple maintenance required to keep tires properly inflated. I question the safety benefit value of these things. If you consider the extra money/hassle/time spent for having a RTF, the money might be better spent on other safety features. Last edited by Hops128i; 08-22-2010 at 10:27 AM.. |
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08-22-2010, 12:43 PM | #38 |
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RFT's are for the mass amount of ignorant dumbasses that drive around without a clue that they have a low tire pressure until some little icon pops up in there face with a loud sound, then they can say "oops I guess i should take my car in now"
Most peoples like us who actually give two shits about our cars and look after them would never need one. If a blowout happens, very rare anyways as long as you're a decent driver. Then you pull over and take advantage of roadside service to tow u to a dealer to have the tire replaced, or a tire shop, etc. |
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08-22-2010, 03:24 PM | #39 | |
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A slight steering correction to the right produced a sharper reaction than an equal correction to the left (the twitchy), resulting in a slight body oscillation (the unnerving) while the car came back on center. After a 4-wheel alignment (left front camber adjustment and a right rear unknown adjustment) the car now handles beautifully; like a whole new vehicle. |
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08-25-2010, 02:08 PM | #40 |
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Update: Went back to runflats and love them
Here's the update.
I'm the original poster, I had enough of the non runflats. took them back to "Americas Tire". They gave me credit for the return and I purchased the OEM Bridgestone 050's. My car feels great and my wife will drive it again. Hopefully I'll get another 33,000 miles out of the rears I appreciate and understand the non runflat crew and the many suspension mods done to their cars. I however am not interested in suspension upgrades for this car, (not yet). I appreciate that I have a bone stock car thats dialed in from the factory for a host of driving scenarios. I just got back from a 700 mile round trip from Southern California to Mammoth last night. Left the family at home this time so I took the "1" rather than the Tacoma, I loaded up the trunk with my fishing and outdoor gear, stuck my "Valentine One" on the windshield and enjoyed every bit of the drive, especially the piece of mind the runflats gave me in the middle of nowhere without a spare. Car drove like a dream. Word of advice for long trips. "use the cruise control". these cars are designed for high speeds. After a while without it my foot got a little heavy and I was at 110 without noticing it. Lots of CHP on the 395. cruised 80 most of the way up. What a cool drive. I received quite a few complements about the car up there. Possibly the first of it's kind to head up Lake Mary Road.
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08-25-2010, 03:51 PM | #41 |
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I replaced stock bridgestones with hankooks and the car is much softer, which is good and bad. I didn't realize switching to the softer sidewall would make such a huge difference, but it did. When I wear these out I'll probably go back to the run flats the way the suspension was intended.
I also bent a rim with the hankooks. There just isn't enough sidewall resistance to protect the tires from potholes. |
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08-25-2010, 03:55 PM | #42 | |
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I agree. There is a lot of good advice in here.
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08-25-2010, 07:36 PM | #43 | |
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But I don't feel safer on a road trip outside the range of my runflat. What do you do after the RFT is shot and you're still 50mi from a dealer which might not even have your particular RFT? I still wish there was a spare, then, at least with a spare in combination with a RFT you could have the range. Additionally you could save a leaky, repairable RFT for a more worthy occasion. |
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08-25-2010, 09:12 PM | #44 |
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Heh..well whatever makes ya happy man
All I know is the Conti DWs I replaced my no-fun-flats with perform very well and are ALOT more comfy with ALOT less noise. I think honestly tire to tire theyre all different in many ways, perhaps you were looking for something the certain tires you bought just dont have, no reason to give up on all non-rft's just cuz of this, that's a mistake. And btw the 050's are not the stock tire that came on the car, least not mine, those were the 760s i believe.. |
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