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BMW 3-Series (E90 E92) Forum
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From RUNflat to NON runflat? who's done this and is it worth the trouble?
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07-16-2010, 10:07 AM | #23 |
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Going to non-rft sounds very tempting... especially with the Fix-A-Flat solution as the temporary solution, but I googled around and found the following article:
http://accuratecars.com/blog/2008/08...of-fix-a-flat/ Seems that there could be some potential negative side affects after using Fix-A-Flat... Any one have experience, or can comment? |
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07-16-2010, 10:36 AM | #24 |
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I did this a few years back and went with RE-10's now onto RE-11's.
I would say it's the best upgrade you can do to the car as it touches every aspect from the feel, ride quality, road noise, turn-in, cornering, braking, grip, and acceleration. Everything is improved. |
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07-16-2010, 10:39 AM | #25 | |
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07-16-2010, 10:52 AM | #26 | |
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07-16-2010, 12:13 PM | #27 |
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I got my car with 14K miles on it -- the original B'stones had already bubbled and failed on two wheels, and been replaced, so the tires were mismatched. By 20K, the two original ones were worn out. That's worse performance than I used to get with Michelin MXXX3 or PS2 summer tires on my old M3!
I now have about 6500 miles on Michelin PS2 A/S+ with 18" sport package. They ride much better than the B'stone bricks did, handle every bit as well (better in bumpy corners, since the tires don't skip over the bumps) the tires are 2/3 the price, and will last twice as long. Plus I get some limited snow capability. I got the compact spare kit from Bavarian Auto, and I also have carried a 12v compressor for years, for slow leaks. Highly recommend ditching the OEM pieces of crap. |
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07-16-2010, 12:48 PM | #29 |
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I'm curious to feel how much better my 19s can feel with non RFT. One time I felt the rear tramline on the freeway. Otherwise, I am not burdened by them except that I cringe when I hit bumps because I don't want bubbles nor do I want the shock to transfer directly to my rim which is notorious for cracking (225m).
Being that I don't mind my Pirelli P-zero run flats, I'll probably replace them with the same tires when they are toast because I get my tires at Americas tire co. With a runflat, I can probably get to one within 20 miles of anywhere I might be and either get it patched if the sidewall is uncompromised, or have them straight up give me a new replacement after paying the $30 to renew the lifetime warranty. If I do replace with non rft, I'll go back to Michelin PS2s. I had a set of regular directional Pilot sports and they got so loud and tramlined when they got worn in...PS2s don't look as aggressive but they were such great tires. I just don't want to be stranded or have BMW assistance tell me that they won't tow me because I put better tires on my car. |
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07-16-2010, 01:09 PM | #30 |
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My car will be making the switch later this afternoon from Bridgestone Potenza RFT to Michelin PS2's
225/35/19 front 265/30/19 back I'll let you know how much better the ride is if at all. Cheers!
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07-16-2010, 01:30 PM | #31 |
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NOOOOOOO.....
Have you driven a FLAT rft??? I have...and you don't know it is flat..that is why they are called run flat tires....why do you think you got TPS on the wheels??? By the time you realize you got a flat you have already driven god knows how many miles. Unlike regular tire, on RFT's you don't have any feelings...it is the same lousy noise harsh ride whether it is inflated or deflated. Most of the tire shops will not touch a rft right now, much less repair with a plug they are worried about liability..they all hate it.
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07-16-2010, 01:32 PM | #32 |
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Just some things to consider:
Our car's suspension system was designed for runflat tires. Accordingly, switching to non-runflats may cause warranty issues. If your car is leased, you will need to have runflats on your car at lease turn in. |
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07-16-2010, 01:36 PM | #33 | |
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Quite simply, the majority of leaks are slow leaks. Either you come out in the AM and your TPMS is on or you're driving along and the TPMS lights up. In the first case the tire is certainly repairable. In the second instance, if your pressure is above 20lbs or so when you take it to the repairshop then your tire can be repaired. Oh, and we're still waiting on the NHTSA cite from you that references the RFT requirement. |
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07-16-2010, 01:53 PM | #34 | |
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sorry...
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07-16-2010, 01:54 PM | #35 | |
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A much better solution is the Conti Comfort Kit. It is available from Tire Rack. It is a 12V compressor that can inject a sealant into the tire. The sealant will not damage the TPMS or the tire. BMW makes a similar product but in the sealant is not nearly as well integrated as it is with the Conti. CA
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07-16-2010, 02:15 PM | #36 |
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I'm a bit confused...On the Tire Rack web site, here's what they say regarding use of the ContiComfortKit:
"This product's sealant may interfere with the tire pressure monitoring sensors on vehicles with direct TPMS, possibly leading to error prompts and incorrect pressure readings. Use of this product on direct TPMS vehicles could also result in damage to the tire pressure sensor inside the wheel. Please contact your sales specialist at Tire Rack for more information." So my question is does BMW use a "Direct TPMS" system? |
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07-16-2010, 02:26 PM | #37 | |
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The Slime company, btw, says their product will not cause damage to TPMS sensors. My take is there is at least a slight chance with any of these, but probably only slight. |
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07-16-2010, 02:27 PM | #38 | |
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07-16-2010, 02:29 PM | #39 | |
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BMW are the ones that are adamant about the use of RFTs. AFAIK, no NHTSA reg requires the use of RFTs. |
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07-16-2010, 02:32 PM | #40 | |
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07-16-2010, 02:40 PM | #42 |
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even at 19inches, a regular tire > RFTS
it's a big difference.. people may even say the same in comparison to 20's. give it a shot
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07-16-2010, 04:13 PM | #43 |
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When I first got this car with rft for my wife, I was totally upset that BMW didn't put a spare in and went the rft route.
I picked up a nail in rear-left tire about 2000 miles into the ownership of the car, on our way to a party some saturday night. I pulled out of the freeway into a gas station and noticed a huge screw inside the tire. oh well. I didn't have to wait for anyone or anything, or get my hands/clothes dirty trying to fix a tire. Being a motorcycle owner as well, trust me, fixing the puncture on a tire on the side of the road is no easy taks, and tire sealant, etc., are not all that they are cracked up to be... chances are, 9 out of 10 times they won't hold pressure and you will need to get towed. Never mind the mess they leave behind inside your tire/rims. Anyhow, discussing this with my wife later, she said that she actually liked the idea that if she ever got a flat when driving the car, that she didn't have to pull over and wait for help/AAA/etc. This made me think about this whole approach for a while, and I now agree with her: I prefer her being able to drive with run-flat tires so she can just continue driving if/when a tire problem comes up; especially with my 4 year old daughter in the car, I wouldn't want them to be standing somewhere waiting for AAA or other towing/help services. Just food for thought for those who have similar family concerns as I do. |
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07-16-2010, 06:10 PM | #44 | |
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