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      01-10-2016, 04:51 PM   #67
dmppdx
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Quote:
Originally Posted by serendib View Post
Thanks for the very informative post Dave

E92 M3 ZCP

I have a set of 18" Apex PS7's that match the OEM ZCP rim WIDTHs (9" fr, 10" rear staggered rim widths) with RE71R 275/35/18 square. Fronts are rubbing slights on the struts under very heavy cornering loads. Will be adding 5mm spacers and this will definitely provide sufficient clearance. Rears clear without spacers.

I am also running the Pzero OEM sizes on the ZCP 19" wheels and will be changing those out to Pzero 275 fr and 295/30/19 rear.

HOWEVER - There are many versions of the Pzero 295/30/19 on Tire Rack.

295/30ZR19 100Y XL Sect 11.6", Tread 11.5"

R01 Audi
295/30ZR19 100Y XL Sect 11.6", Tread NA (does anyone know the tread width?) i.e. Will these fit without rubbing?

N2 Porsche
295/30ZR19 100Y XL Sect 11.9", Tread 11.7"
(Assume this is the tire you refer to in the above post as viable on ZCP rim)

295/30ZR19 100Y XL Sect 11.9", Tread 12.5"
(Assume that these will rub)
Anyone know how this tire is so much more tread on the ground?

BMW
295/35ZR19 104Y XL Sect NA, Tread 9.9"
Due to the reduction in tread wouldn't want these anyway but assume these are too tall AND also may rub

Any advice is greatly appreciated.
I was always confused with the difference in tread width between tires of the same size and model but then I saw the following article which basically explains how Tirerack.com measures tires. The difference in tread measurement may have more to do with the shape of the tire than actual width of the tread. Changing the shape of a tire apparently changes how it handles with more round shaped tread making it more progressive at break away. I suspect car manufactures are likely asking for tires that are more round so they are more predictable and better for normal drivers.

http://www.tirerack.com/tires/tirete...jsp?techid=201
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      01-17-2016, 04:27 PM   #68
Dave07997S
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Quote:
Originally Posted by serendib View Post
Thanks for the very informative post Dave

E92 M3 ZCP

I have a set of 18" Apex PS7's that match the OEM ZCP rim WIDTHs (9" fr, 10" rear staggered rim widths) with RE71R 275/35/18 square. Fronts are rubbing slights on the struts under very heavy cornering loads. Will be adding 5mm spacers and this will definitely provide sufficient clearance. Rears clear without spacers.

I am also running the Pzero OEM sizes on the ZCP 19" wheels and will be changing those out to Pzero 275 fr and 295/30/19 rear.

HOWEVER - There are many versions of the Pzero 295/30/19 on Tire Rack.

295/30ZR19 100Y XL Sect 11.6", Tread 11.5"

R01 Audi
295/30ZR19 100Y XL Sect 11.6", Tread NA (does anyone know the tread width?) i.e. Will these fit without rubbing?

N2 Porsche
295/30ZR19 100Y XL Sect 11.9", Tread 11.7"
(Assume this is the tire you refer to in the above post as viable on ZCP rim)

295/30ZR19 100Y XL Sect 11.9", Tread 12.5"
(Assume that these will rub)
Anyone know how this tire is so much more tread on the ground?

BMW
295/35ZR19 104Y XL Sect NA, Tread 9.9"
Due to the reduction in tread wouldn't want these anyway but assume these are too tall AND also may rub

Any advice is greatly appreciated.
Once again, yes you can fit a 275/295 setup on the OEM ZCP wheels its just not going to be optimal. You don't want to run a 295/35/19 those are way to tall at over 27". IMHO, I wouldn't go beyond a GTS setup on the OEM ZCP wheels. You can run the Pirelli PZero which they have in GTS sizes. I moved on from the ZCP wheels and I am now running VMR V810 flowformed wheels in 19X10 and 19X11 with 275/30/19 front and 295/30/19 rear and I can't tell you on how planted the car feels even over my GTS setup.

A couple of pics..





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2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow VMRV810 19x10&19X11 275/295 Mich PSS.
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
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      01-17-2016, 07:18 PM   #69
aussiem3
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Quote:
Originally Posted by Dave07997S View Post
Once again, yes you can fit a 275/295 setup on the OEM ZCP wheels its just not going to be optimal. You don't want to run a 295/35/19 those are way to tall at over 27". IMHO, I wouldn't go beyond a GTS setup on the OEM ZCP wheels. You can run the Pirelli PZero which they have in GTS sizes. I moved on from the ZCP wheels and I am now running VMR V810 flowformed wheels in 19X10 and 19X11 with 275/30/19 front and 295/30/19 rear and I can't tell you on how planted the car feels even over my GTS setup.
Nice
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      01-17-2016, 11:09 PM   #70
Dave07997S
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Quote:
Originally Posted by aussiem3 View Post
Nice
Thanks!!
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