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BMW 3-Series Run Flat Tires

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Comments

  • circlewcirclew Posts: 8,353
    Shipo, you probably have 2MM miles under your belt! You got a good GC minivan judging by your use!

    Thanks for your strategy on tires. I was hoping you go for the 328T SP. Will the twin turbo be appealing to you if offered when you are ready?

    I never thought of dropping down to 16's as as a way to save cash. Great idea for the snows. Makes even better sense if you can use them on a second vehicle later on.

    Can you do the same 16 inch on the 5 series?

    Regards,
    OW
  • shiposhipo Posts: 9,152
    "Shipo, you probably have 2MM miles under your belt!"

    I added it up a year ago or so and if I recall correctly, I'm going to cross the one million mile mark sometime later this year. :shades:

    "You got a good GC minivan judging by your use!"

    Our 1998 (a Gen3 van) only has 132K and change on the clock, on a different forum I've run across a couple of individuals that have in excess of 300K on their Gen3 vans and I rode in a Gen3 taxi a couple of years back that was over 400K. Yikes! Needless to say, with those other vans in mind ours is barely broken in. ;-)

    "Will the twin turbo be appealing to you if offered when you are ready?"

    Ohhh, well, depending on how things work out in the future, I could be tempted, sorely tempted. I have a few irons in the fire, and coupled with some of the spy shots of the soon to be "lifted" E60, a 535i might could well be my next new car. In the mean time, there are so many different directions that our future might take, hedging my bets by staying with the DGC or picking up an old 528i is probably the smartest thing I can do.

    "I never thought of dropping down to 16s as as a way to save cash."

    For the E90 325i and 328i, the best wheel tire combination for winter tires (for both performance and cost reasons) are with 16" rims, unfortunatly there are no sixteens made that will fit on either the 330i or the 335i (no clearance for the larger brakes).

    Regarding the 5-Series, the situation is a little muddier. If I recal correctly, the following is the optimal wheel size for the various E39 and E60 5-Series models:

    E39 - 525i - 16" wheels
    E39 - 528i - 16" wheels
    E39 - 530i - 17" wheels*
    E39 - 540i - 17" wheels*
    E60 - 525i - 17" wheels*
    E60 - 528i - 17" wheels**
    E60 - 530i - 17" wheels*
    E60 - 535i - 17" wheels***
    E60 - 545i - 17" wheels
    E60 - 550i - 17" wheels

    * There are actually a few 16" wheels that have proper caliper clearance (different offset and such than the 3-Series).
    ** Speculation here as the 528i isn't out yet, this car will most likely have the same brakes as the 530i.
    *** Speculation again as my guess is that the 535i will have the larger 545i/550i brakes.

    Best Regards,
    Shipo
  • We have the same problem here in the UK for fitting 16" wheels on the 330's. 17" is the minimum. Like my E39 540i 17" is the smallest to fit around the brakes.

    BMW UK don't seem to be admitting there is a RFT problem with the Bridgestone's over here. True it is the Potenza RE050A's that I have problems with, severe 'heel and toe' wear. Awful driving dymanics. I hate 'bump' and 'tug' steer.

    We are not yet supported in the UK for winter RFT's. The RE050 A is a summer tyre, not even all season.

    I've been in contact with Bridgestone and they have opened up dialog. Hope they will further their investigation, even road test my tyres.

    My Goodyear F1's are giving a completely different drive. A 'real' BMW.

    QUESTION: Do any of you guys find that lower ambient temperatures spoil your drive? Not freezing conditions, but a few above, say around 40-45 deg F.

    I'm researching this issue and believe lower temperatures are making for the rougher driving, contributing to the premature wear as well. The static pressure doesn't convert to full working pressures during short journeys and/or in colder ambient temperatures. Add a wet environment and add to the problem, even longer journeys are needed to warm the tyres and achieve working pressure.

    I've conducted some experiments and been recording pressures and tyre warmth, this supports what I'm saying.

    Any experiences or observations to assist/support this thinking?

    HighlandPete
  • circlewcirclew Posts: 8,353
    Pete,

    My experience regarding extreme wear during the 12K miles was about 60% over the temperature range you suggest (mostly highway miles on GSP). That makes about 40% of your target range. I had the tires between Dec. 31 2005 and January 2006 in New Jersey. Our winter last year was above average so I believe the rubber compound on the EL 42 (produced 2005) was a problem despite temperature since even the summer was not that hot in 2006. I noticed the noise, hard ride at about 8-10K miles.

    Put another way, considering a non-extreme temperature range, the uneven wear caused the shoulder 'cupping' that was apparent before 10K miles on a 300 treadwear tire which should provide normal wear for at least 20K miles. My dealer had no problem changing for free on the first request.

    Just me personal observations.

    Regards,
    OW
  • pearlpearl Posts: 336
    The first E39's had 15 inch wheels. My 97 528 is shod with 225X60X15 tires. I think they went to 16 inch wheels for the 99 model year.
  • shiposhipo Posts: 9,152
    I did not know that. :blush:

    Thanks for the correction. ;-)

    Best Regards,
    Shipo
  • I've browsed through this thread and from the looks of it a couple people have simply patched up their tire, rather than buy a new one (ie small nail/leak). I'm currently in the same situation so I was just wondering if a simple patch work will hold me over for a while. Are there any problems in doing this with the pressure sensors?

    thanks.
  • At last a bulletin from BMW on Run Flat Tires.

    www.bmwtis.com/tsb/bulletins/bulletin_graphic_temp/B360606g.htm
  • webby1webby1 Posts: 209
    Shipo,

    As you know the 335i sedan sport package comes with 225/40-18 front and 255/35-18 back...I am trying to soften the ride but still have the handling.
    Drove the coupe this weekend with 17 inch wheels and conti's run flats all season grand touring tires.
    It felt good....firm but not harsh and great control.....coupe has sport suspension as standard.

    Conti's Grand Touring All season...."Conti Pro Contact" are not available in exact sizes, can I go with 245/40VR18....93V on all four ?

    I am trying to get the same ride ( as the coupe) on the sedan with 18 inch wheels....unfortunately the dealer does not have any vehicles with 18 inch and reg tires.

    Your opinion would be appreciated.

    Thanks and Regards,

    Webby
  • circlewcirclew Posts: 8,353
    Webby, I have the Conti all-season RFT's for around 3K miles and the results are very satisfying. Wear is very even comapred to the Bridgestone's which were original equipment on this '06 330xi.

    Regards,
    OW
  • shiposhipo Posts: 9,152
    Hmmm, 245/40 VR18s all of the way around? I'm thinking that those would be too wide to fit properly in the front wheel well.

    The two things that I can think of (trade-offs with both) are:
    1) You might want to consider is a set of GFTs in the OEM size. BlueGuyDotCom did this on his 330i SP (same size wheels and tires as your 335i) and was quite pleased with the results. Smoother ride and IMPROVED handling. The drawback(s)? No spare and no Run Flat capabilities. The compromise solution? A can goo that you shoot into the tire to temporarily plug the leak.
    2) The other option is to chuck the OEM rims and go with a set of 17s and either RFTs or GFTs. The taller sidewall will soften the ride (and opting for GFT 17s will soften it further). The drawback(s)? Slightly reduced handling (depends upon the tire sizes). Flat tire recovery same as option #1.

    Were I in your shoes, I might be tempted to buy a cheap set of Kumho ECSTA ASX tires in the OEM size (~$500 for the set) and give them a roll. Let us know what you decide. ;-)

    Best Regards,
    Shipo
  • webby1webby1 Posts: 209
    OW,

    I assume your '06 330xi has sport suspension and 17 " wheels ?

    Regards,
    Webby
  • webby1webby1 Posts: 209
    Thanks Shipo,

    "Hmmm, 245/40 VR18s all of the way around? I'm thinking that those would be too wide to fit properly in the front wheel well."

    BMW dealer thinks that it will fit but will not confirm until mounted.
    My concern is that the wheels are staggered...larger in the back. Same size tire (all 4 )but larger rims at the back...is that an issue ?

    Here is the response from the dealer:

    "The 245/40r18 has an approved rim width of between 8-9.5

    The 225/40r18 are 8.0

    The 255/35r18 are 8.5"
    Regards,
    Webby
  • kyfdxkyfdx Posts: 27,640
    If you want to go with the same size all around.. you need 8.0" wheels with 225/40-18..

    MODERATOR
    Prices Paid, Lease Questions, SUVs

  • circlewcirclew Posts: 8,353
    Webby,

    Yes. 17 inch all around. There is no sport suspension offered on the xi model. 225/45 front/back.

    Regards,
    OW
  • If interested I have a set of 17" Wheel #161 with 1000 miles
    225/45/17 front, 245/40/17 rear Bridgestone REO50AII RFT for sale. These ride as well as 205/55/16.
  • webby1webby1 Posts: 209
    I would be interested in the wheels if they were all one size.
    Regards,
    Webby
  • shiposhipo Posts: 9,152
    I don't believe the wheel size is the issue (unless you try to rotate the tires by moving the wider wheels to the front), my concern really is that you might have 1) rubber hanging out beyond the fender, a condition that is illegal in some localities, and/or 2) the wider front tires might rub on the inner fender linings when the steering wheel is at either extreme.

    The question I have is, "Why do you want to mount 45 series tires all of the way around?" I seriously doubt that you're going to improve your ride at all if you use tires of the RFT variety, and if you aren't staying with RFTs, I suspect that you'd be better off (from both a ride and handling perspective) by staying with the OEM tire size.

    Best Regards,
    Shipo
  • webby1webby1 Posts: 209
    My intention was to stay with Conti's Pro Contact.
    If you were selecting for 18 inch staggered wheels which tire combo would you select?

    http://www.tirerack.com/tires/Spec.jsp?make=Continental&model=ContiProContact&ti- rePageLocQty=

    Thanks and Regards,

    Webby
  • The wheels are staggered. 8" wide to fit the 225/45/17 front the rear are 8.5" wide to fit 255/40/17's. I'm selling the wheel/tire combo for about the cost of the tires alone.
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