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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 01-19-2015, 11:36 AM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Location: Georgia
 
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Mein Auto: BMW 645Ci
Tires for 645Ci

My 645Ci with Sport option is currently a daily driver. I need new rear tires presently. I do not drive hard, and wet road safety is my main requirement. Almost let the dealer replace with the Bridgestone runflat but the lack of hazard coverage and labor cost stopped me. Also, why does the dealer keep over inflating my tires? They are the stock 19" wheels and the tire placard in the drivers door jamb clearly states for up to two people 29psi front and 32psi rear. Not almost 40 psi !?! I like the runflat idea but with such a fast wearing tire it does not seem practical. I like the road hazard coverage at tire shops but wonder if their alignment equipment and skill is what it should be. Had wheels marked up on another car from a bad tire mount job. Have always believed in the dealer and Michelin, but my 645Ci summer tire options and the need for some tire longevity is perplexing.

Has anybody had any experience with the Michelin Primacy HP ZP runflat tire or is the ZP version too new?

I am looking at four options:
1)Bridgestone Potenza RE050A Run Flat ?
2)Michelin Primacy HP ZP ?
3)Michelin Pilot Super Sport with BMW 71100413439 Tire Mobility Kit or Space Saver 135/80/17 tire with cargo net ?
4)Michelin Pilot Sport A/S 3 with BMW 71100413439 Tire Mobility Kit or Space Saver 135/80/17 tire with cargo net ?
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Last edited by MySILBERGRAU645; 01-19-2015 at 04:12 PM.
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  #2  
Old 01-19-2015, 01:05 PM
FredoinSF FredoinSF is offline
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Location: Bay Area and Reno
 
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Mein Auto: 650i 330cic X5d MINI
I have the super sports on my 3 series convertible and it is a great tire. Quiet too. I have no experience in the wet with it since that car usually stays in the garage if the top can't go down. They will wear out quicker than an all season tire.

Several people here like the Conti DWS. I had a set on the 650 but was not too impressed because there was a constant small vibration that never went away after multiple attempts at balancing the offending tire. All is back to normal now that the DWS' are history. Given the positive feedback I read here my experience is the exception rather than the rule and I might give them another try down the line especially considering that they are quite a bit cheaper than the Michelins.
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Old 01-19-2015, 02:53 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Location: Georgia
 
Join Date: Nov 2014
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Mein Auto: BMW 645Ci
Michelin SS

I am leaning towards the Michelin SS. The Michelin PS A/S 3 might be longer lasting, except I worry about proper drivability on this car. Might even just put a fifth one with a matching wheel in the trunk. I keep thinking that BMW chose the Bridgestone for a reason though as they recommend more than one brand on various BMW models. Thanks for the info FredoinSF.

Last edited by MySILBERGRAU645; 01-19-2015 at 02:56 PM.
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Old 01-19-2015, 03:25 PM
kmgrady01 kmgrady01 is offline
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Mein Auto: 2005 645ci convertible
Quote:
Originally Posted by MySILBERGRAU645 View Post
I am leaning towards the Michelin SS. The Michelin PS A/S 3 might be longer lasting, except I worry about proper drivability on this car. Might even just put a fifth one with a matching wheel in the trunk. I keep thinking that BMW chose the Bridgestone for a reason though as they recommend more than one brand on various BMW models. Thanks for the info FredoinSF.
I have the Michelin PS A/S 3 since I live in the NW and it is a fantastic tire. Handling and responsiveness is great regardless of road conditions (full disclosure, I haven't and won't be driving this car in the snow).
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Old 01-19-2015, 04:30 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Good to know kmgrady01

I like that the Michelin PS A/S 3 is all season with extra tread wear warranty. I was between the Michelin PS A/S 3 and the Michelin Super Sport because Consumer Reports rated the SS a bit better with regards to wet and hydroplaning. The SS is a summer tire with less tread wear warranty, but the reviews online seemed to support that the PS A/S 3 wears just as fast, but you have the extra tread life warranty factor. I don't see many testimonials for the Michelin Primacy HP ZP run flat.
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  #6  
Old 01-19-2015, 05:29 PM
HerbP HerbP is online now
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Mein Auto: 2005 645Ci & 2007 750Li
Quote:
Originally Posted by MySILBERGRAU645 View Post
I like that the Michelin PS A/S 3 is all season with extra tread wear warranty. I was between the Michelin PS A/S 3 and the Michelin Super Sport because Consumer Reports rated the SS a bit better with regards to wet and hydroplaning. The SS is a summer tire with less tread wear warranty, but the reviews online seemed to support that the PS A/S 3 wears just as fast, but you have the extra tread life warranty factor. I don't see many testimonials for the Michelin Primacy HP ZP run flat.
Ditch the run flats, & get a smoother ride & less flat tires. The Michelin PS A/S 3 is a very good tire.
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  #7  
Old 01-19-2015, 05:54 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Great point HerbP

I have seen a number of comments online about run flats having more issues with debris and flats.
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  #8  
Old 02-12-2015, 02:33 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Mein Auto: BMW 645Ci
Contemplating 18" OEM wheels

I am contemplating going from the 19" OEM wheels to the base 18" OEM wheels all the same width. Fitment should not be an issue and I like the look of the base wheels as well. After weeks of careful deliberation I truly feel the stock 18" wheel setup is a safer and more cost effective arrangement for the real world. I don't go to a track, nor do I speed and drive aggressively. Wet traction is my main concern and I think the 18" wheels and tires would be better for that as well.

Important note : I also notice that the 2004 tire placard states 29 front and 32 rear tire pressure, as the 2005 tire placard was changed to read 33 front and 39 rear, as if BMW realized the 29/32 info was under inflated.
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  #9  
Old 02-12-2015, 03:29 PM
HerbP HerbP is online now
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The convertibles run higher air pressures. I think that with the 2007 models, the pressure did go up some? I would run what is on your car.
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  #10  
Old 02-12-2015, 03:46 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Dealer recomends higher pressure as well.

I was told that the tires on my car are showing wear from under inflation. An independent BMW repair shop also told me the tire pressures of 29 and 32 were too low for the tires.
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  #11  
Old 02-17-2015, 07:17 PM
Loquacious Loquacious is offline
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Mein Auto: 2005 645CI
My 2005 645ci shows 33 and 39 tire pressures. dealer had replaced my tires just before I bought it (used) they put the Bridgestone Potenza run flats, I checked a Bridgestone service center prices and found the Dealership prices beat the Bridgestone prices. but like everyone says you are one pot hole in the highway from problems with those tires. trade off with better durability vs better control at higher speeds. if you do not mind the different profile your car will have after the change in tire size. good luck
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  #12  
Old 02-17-2015, 08:25 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Mein Auto: BMW 645Ci
Good Info Loquacious

I think the 18" wheels look just as good as the 19" wheels. I notice no obvious difference in the width between an 8" and a 9" filling the wheel well. I keep my tires clean and shined at all times so it would not be as obvious they are fatter tires.
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  #13  
Old 02-18-2015, 05:26 PM
MySILBERGRAU645 MySILBERGRAU645 is offline
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Mein Auto: BMW 645Ci
Same width at all four corners.

I may even place two 19" x 8.5 wide wheels at all four corners. The fitment will work fine, have a bit better hydroplaning resistance, and allow all four tires to be rotated for better tread wear mileage and warranty. I was already planning to purchase an additional 19" x 8.5 wide as a spare if I keep the 19's, so it would just be a couple extra wheels.
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