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      07-16-2014, 04:19 PM   #1
jake169
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Transitioning into non-runflats

After a whole lot of research and ever so positive reviews and recommendations, I finally decided to go for the Michellin Pilot Super sports. It was not easy as the ease and convinence of the RFT's in the event of a falt is just perfect.
I have the 19" M wheels on my 11 35is.
Can someone please guide me on the tire pressure to keep so as to have the TPMS work as intended.
Fronts are 225/35/19
Rears are 255/30/19

Thanks All.
Jake.
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      07-16-2014, 06:21 PM   #2
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I personally use the OEM tire pressure and just chalk up the sidewalks and take a look after each lapping session to check on whether or not I can lower the air pressure.

I have been ok with OEM tire pressure on 235/40/18 and 265/35/18 dunlop zii

My understanding is if you want to very precise about about tire pressure, you would need pyrometer to check for even temperatures across the width of the tread. I haven't bothered because the sidewall looks ok and I am lapping for fun, not points or $.

good luck
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      07-17-2014, 10:08 AM   #3
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Thanks NIcknaz for the info. Although I don't track the car, it is just a regular weekend car.
I just don't want to verinflate and blow up the tire.
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      07-17-2014, 10:11 AM   #4
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I have non run flat Michelin PSS and I run around 4psi under the run flat pressures. This is the best mix for comfort/performance and wear that I've found. Lower than this and the outer edges wear, higher than this can become less comfortable.
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      07-17-2014, 10:29 AM   #5
jake169
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Thanks Maniac. Pardon my ignorance, but dosen't your TPMS go off for having it lower.
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      07-17-2014, 11:07 AM   #6
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TPMS is designed to sense a difference between when you calibrate it and the rest of the time. So when I set the pressures, I then run the TPMS calibration in the iDrive and job done.
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      07-17-2014, 03:07 PM   #7
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Quote:
Originally Posted by ManiacGT View Post
I have non run flat Michelin PSS and I run around 4psi under the run flat pressures. This is the best mix for comfort/performance and wear that I've found. Lower than this and the outer edges wear, higher than this can become less comfortable.
What tyre sizes are you using for the PSS?

I've ordered 265/30 on the rear and 235/35 on the front. Going to have them fitted soon as the current tyres are struggling with the new ECU remap!
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      07-17-2014, 04:42 PM   #8
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Any one looked at vredestein ULTRAC VORTI R ?
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      07-19-2014, 10:25 AM   #9
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I just moved from Runflats to PSS's and really like the tires. They are near silent. I run 36 in the front and 42 psi for the rear .
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      07-20-2014, 06:52 PM   #10
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Any one looked at vredestein ULTRAC VORTI R ?
Not tried them but I was really impressed with the Ultrac Sessantas.

The PSS seem to be the king of tyres at the moment so I just went with them.

There's a site called TyreLeader that are a fair bit cheaper than most if you're planning on buying new rubber. Just used them for mine and they are very fast with the delivery.
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      07-22-2014, 12:54 PM   #11
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Quote:
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Not tried them but I was really impressed with the Ultrac Sessantas.

The PSS seem to be the king of tyres at the moment so I just went with them.

There's a site called TyreLeader that are a fair bit cheaper than most if you're planning on buying new rubber. Just used them for mine and they are very fast with the delivery.
Hey there - yeah I had Ultrac Sessantas on my S2000 best tyre i ever used....think i will be changing to the new offerings from vredestein...

vredestein also offer a RFT..
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      07-22-2014, 03:28 PM   #12
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I have Michelin PSS and I run 32/36. Love this setting and anything higher than 36-38 in the rear was pre-maturely wearing the tread.
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      07-22-2014, 06:03 PM   #13
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Quote:
Originally Posted by Vintage View Post
I have Michelin PSS and I run 32/36. Love this setting and anything higher than 36-38 in the rear was pre-maturely wearing the tread.
How many miles are you getting on the rears with this lower psi?
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      07-23-2014, 02:29 PM   #14
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My experience with NON RFTs is that if the pressure s too high you will feel really loose in the corners. HOwever, I have always been able to run the recommnded pressure on the door jam with no problem. Just when at the track i try to lower it a bit from there. No other issues noticed.

I did have a tire company once put 55PSI in all 4 tires and i didnt think to check it. After a week of driving it was like i had 15000 miles on the car even though there wasnt that much tire wear. I felt a significant drop in traction. Those tires didnt last but about 13000 miless too. I should have forced them to replace the tires.
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      07-23-2014, 03:02 PM   #15
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Quote:
Originally Posted by rking117 View Post
I felt a significant drop in traction. Those tires didnt last but about 13000 miless too. I should have forced them to replace the tires.
Was the wear uneven and concentrated on the center of the tread block? If not, 13k miles is about right for a set of aggressive summer tires, especially if you track your car.
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      07-24-2014, 09:08 PM   #16
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Quote:
Originally Posted by nicknaz View Post
Was the wear uneven and concentrated on the center of the tread block? If not, 13k miles is about right for a set of aggressive summer tires, especially if you track your car.
the wear was uneven for sure. when I swapped them they had cords showing. 13K with cords showing is unusual. I usually get 18K or so out of tires so 13K shocked me. Actually the wear was on the inside due to the negative camber that BMW uses it was like the tires rode on one side of the tire only while it had that much pressure in it. I felt a tremendous difference once I swapped them out.
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      07-25-2014, 11:01 AM   #17
jake169
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So I fianlly got the Michellin's on. :happy anim:
What a freaking difference, as if the car was on railings and smooth. Although the service centre put in the same PSI as the run-flats. Not sure sure if I should muck with it. I think he said 36 in the fronts and 44 in the rear. Whatever is in the door jam.
How would I reset the TPMS to learn the new PSI if I was to bring down the PSI a little in the rear/fronts for comfort daily driving..

Thanks...
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      07-25-2014, 11:11 AM   #18
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      07-25-2014, 02:42 PM   #19
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Quote:
Originally Posted by jake169 View Post
So I fianlly got the Michellin's on. :happy anim:
What a freaking difference, as if the car was on railings and smooth. Although the service centre put in the same PSI as the run-flats. Not sure sure if I should muck with it. I think he said 36 in the fronts and 44 in the rear. Whatever is in the door jam.
How would I reset the TPMS to learn the new PSI if I was to bring down the PSI a little in the rear/fronts for comfort daily driving..

Thanks...

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      07-25-2014, 03:41 PM   #20
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I changed my wheels and tires how does tpms is working? Or not working because it didnt work until now
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      07-27-2014, 08:31 AM   #21
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Make sure your installer re-installed the TPMS sensors and then follow the reset instructions in the manual. It works perfectly if you do that.
FYI: I have my tires set to 36 F, 39 R. But, to be honest, I'm still playing around with the pressures. Will probably end up going a little lower.
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      07-27-2014, 10:39 AM   #22
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So far less than 10k miles on them as the Z is our third car now; in short, I have no idea how long they will last but I would guess 20k?
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