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10-09-2007, 10:31 PM | #45 | |
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So true, many E90 owners dumped their RFTs. |
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10-10-2007, 12:41 AM | #46 | |
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I co-drive a Porsche and an Alfa and prepare an E36 in club racing, so I think I know my tires better than you do. |
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10-10-2007, 01:13 AM | #47 | |
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10-10-2007, 02:06 AM | #48 | |
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I didn't want to get into the whole RF vs non-RF thing because it was off-topic and kind of like beating a dead horse. But apparently it's a sensitive subject here, you mention the word "RFT" and someone will give you a lecture. |
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10-10-2007, 06:40 AM | #49 | |
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...they're still crap & the suspension works better with normal tires. Sooooo what's the import of the statement "developed for RFs"? - nothing, zip, nadda, .....all marketing BS
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10-10-2007, 07:43 AM | #51 |
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i was wondering the same thing. my e46 17" package wouldn't fit the e92 335 so i had to get new but maybe it will fit the 1er. they've only got a few thousand miles on them.
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10-10-2007, 08:38 AM | #52 |
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Jeez we have some serious RFT haters here. I get it that you like your normal tires, OK? But we are not exactly discussing that here. The guy said E82 had to have RFTs because there was no room in the trunk, I was simply responding to that by stating the E82 was designed to work with RFT - which, you can't prove otherwise unless you have a pic of a test mule on non-RFTs. I didn't say "RFTs actually work on E82" or "RFT FTW." Start a damn "I hate RFT" thread in the tires section if you'd like to continue the RFT vs nonRFT dicussion.
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10-10-2007, 09:19 AM | #53 | |
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Whats it matter, their on BMW's..! Get a flat tire and how is that your problem, I have a 1-800 I call and some nice gentlemen comes and fixes it for me...! So why argue about a spare tires...?? -Garrett |
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10-10-2007, 09:20 AM | #54 |
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It is true. The suspension on E9x cars was calibrated specifically for runflats. Designed here means just that - the calibration, not the entire geometry design and concept.You can tell that if you drive an E92 Sport Package, which rides very stiffly over minor imperfections - as stiffly as an E46 SP - but floats over the big stuff. That means that the stiffness of the damping was dialed back a bit, say 10-20%, which is compensated for by the extra stiffness of the RFT sidewalls. (I'm making up the actual percentages here, they may be different in real life).If you take an E92 and throw away both the runflats and suspension, you can make it handle just as well as any previous generation bimmer.
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10-10-2007, 09:26 AM | #55 | |
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It just gets me when the marketing people make things sound magical
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10-10-2007, 09:29 AM | #56 | |
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02-14-2008, 07:54 AM | #57 |
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TheUltimateDriver,
I took the liberty of adding offset info to your original post. Hope you don't mind.
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02-14-2008, 11:16 AM | #59 |
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02-23-2008, 12:29 AM | #60 |
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So How do I know if the BBS wheels I want will fit?
Do I pay attention to the Bolt Circle numbers or just the size and ET?
What does ET stand for? Here is what I want: http://www.bbs-usa-appguide.com/publ...m?CLID=15&WF=4 :iono: |
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02-23-2008, 07:36 AM | #61 |
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ET refers to offset, which should be somewhere between 38 - 45 (THAT IS JUST A GUESS UNTIL WE HAVE THE CARS TO TEST FITMENT).
Bolt circle must be 5 - 120, Center Bore (CB) 72.5
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03-05-2008, 03:48 PM | #62 |
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awesome I will be getting my 135i from the factory with the 17's. Buying a set of SSR lightweight wheels and some performance tires. Than slapping Blizzak snow tires on the 17's for the winter
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03-05-2008, 04:52 PM | #63 |
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Only if you stay away from the Sport Package, I think... otherwise you get the staggered 18's.
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03-11-2008, 04:04 PM | #64 |
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More clues on tire fitment via the Hartge website. They are suggesting with a 40ET you can get 235/35s on an 8" wheel up front.
37 87 2380 JHARTGE CLASSIC 2 wheel set 8 x 19" offset 40 with 225 / 35 ZR 19 front 9 x 19" offset 46 with 225 / 35 ZR 19 reara37462380 = ' 1 2 3 '37 46 2380 JHARTGE CLASSIC 2 wheel set 8 x 19" offset 40 with 235 / 35 ZR 19 front 9 x 19" offset 46 with 235 / 35 ZR 19 reara37872390 = ' 1 2 3 '37 87 2390 JHARTGE CLASSIC 2 wheel set 8 x 19" offset 40 with 225 / 35 ZR 19 front 9 x 19" offset 46 with 255 / 30 ZR 19 rear
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03-11-2008, 04:22 PM | #65 | |
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My experience is that any street setup is going to destroy the tires on the track anyway, not nearly enough camber up front and too much weight transfer too quickly for the rears to work right. It's my wife's car so I can't go crazy, but I do intend to borrow it for trackdays, so the plan is to install camber plates and adj ARBs. Leave the springs as they are, but at least give the outer halves of the front tires a fighting chance for survival. All this means dedicated track tires, and since you've used those fancy PS2 street tires and also race, I'd be interested in your opinion. I've been planning to buy one of the harder wearing R-compounds, eg Toyos or PS Cups. However this isn't competition and the suspension will be far from optimized for these things even with a few degrees of camber. How would a set of PS2s compare for longevity and grip as an alternative to Rs?
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03-11-2008, 05:10 PM | #66 | ||
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I think I'll go a different route with the 1, because the PS2's are very expensive. Perhaps throw in a set of those inexpensive Azenis RT615, use for street and track and replace as needed. BTW, I think PS2 runflats may soon become available.
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