Notices
996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.
Sponsored by:

997 turbo rims fit 996 turbo?

 
  #46  
Old 01-19-2011, 12:27 PM
landjet's Avatar
Registered User
Join Date: Apr 2007
Location: Maryland
Posts: 3,647
Rep Power: 270
landjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond reputelandjet has a reputation beyond repute
You may be wise to reset your steering angle sensor after going to the 19's. This may be what is causing the PSM intervention.
 
  #47  
Old 01-19-2011, 09:20 PM
MikeR397's Avatar
Registered User
Join Date: Mar 2010
Location: SE Michigan
Posts: 686
Rep Power: 52
MikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant future
Originally Posted by landjet View Post
You may be wise to reset your steering angle sensor after going to the 19's. This may be what is causing the PSM intervention.
Tried it, $95 at Porsche. Did not help.
 
  #48  
Old 01-20-2011, 12:07 AM
TheCarDudes's Avatar
Registered User
Join Date: Oct 2008
Location: Thousand Oaks, CA
Posts: 166
Rep Power: 17
TheCarDudes will become famous soon enough
After reading all the threads I have opted to go with the following tires sizes. It shows the least number of revs delta (4) resulting in a .0453% difference.

225/40/19
305/30/19

I didn't want to push the envelope on the width of the 315. These actually fill out the wheel well very nicely. I am also running 7mm spacers on the front and 14mm on the rear. Pics to follow tomorrow in the daylight.

I found this website very useful since you can input multiple tires sizes for comparison including OD, sidewall, revs per mile, tread width, everything. Hopefully this helps with the question or issues of tire size discrepancies.

http://www.1010tires.com/TireSizeCalculator.asp
 

Last edited by TheCarDudes; 01-20-2011 at 12:18 AM.
  #49  
Old 01-20-2011, 09:10 AM
MikeR397's Avatar
Registered User
Join Date: Mar 2010
Location: SE Michigan
Posts: 686
Rep Power: 52
MikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant future
Originally Posted by TheCarDudes View Post
After reading all the threads I have opted to go with the following tires sizes. It shows the least number of revs delta (4) resulting in a .0453% difference.

225/40/19
305/30/19

I didn't want to push the envelope on the width of the 315. These actually fill out the wheel well very nicely. I am also running 7mm spacers on the front and 14mm on the rear. Pics to follow tomorrow in the daylight.

I found this website very useful since you can input multiple tires sizes for comparison including OD, sidewall, revs per mile, tread width, everything. Hopefully this helps with the question or issues of tire size discrepancies.

http://www.1010tires.com/TireSizeCalculator.asp
You might want to double check that if you are putting these on 997tt wheels on a 996tt. 305/30/19 is 26.3'' tall, and your fronts are 26.1'' tall, and IIRC, the max height recommended on a 996tt is 25.5''; anything more and rubbing is possible. Perhaps you won't get rubbing driving down the driveway, but with turns or aggressive driving you might have a serious problem.

I'd advise you to contact Porsche about this, although I'm afraid they are always not that much help when it comes to modifications, even if just with newer model equipment on old cars.
 
  #50  
Old 01-20-2011, 03:55 PM
Turbo Fanatic's Avatar
Registered User
Join Date: Feb 2004
Location: In a Canyon - Really :)
Posts: 4,892
Rep Power: 283
Turbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond reputeTurbo Fanatic has a reputation beyond repute
You'll be fine. Plenty of people run 315/30 18s ... just keep the ratios.
 
  #51  
Old 01-20-2011, 07:25 PM
MikeR397's Avatar
Registered User
Join Date: Mar 2010
Location: SE Michigan
Posts: 686
Rep Power: 52
MikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant future
Originally Posted by ari View Post
You'll be fine. Plenty of people run 315/30 18s ... just keep the ratios.
I'm not sure I follow. Are we not talking about a 19'' rim here? Also, 315/30/18 says 25.5'' tall, not 26.3'' tall like TheCarDudes is suggesting he'll get. The concern is rubbing here, not ratios or overheating the diff from improper ratios.
 
  #52  
Old 01-22-2011, 06:05 PM
TheCarDudes's Avatar
Registered User
Join Date: Oct 2008
Location: Thousand Oaks, CA
Posts: 166
Rep Power: 17
TheCarDudes will become famous soon enough
Update

After reconsidering all the info here I opted to go to the following combination:

235/35/19
315/25/19

The other setup I had was too tall and looked terrible on the car. I only chose that combo mainly because the revs per mile and OD was the closest front to back. I knew I would be playing with fire on the rubbing aspect. Furthermore, the new set up looks 1000% better.

Thanks to everyone for posting the info.

Here are the pics:
 
Attached Images   
  #53  
Old 01-22-2011, 06:39 PM
MikeR397's Avatar
Registered User
Join Date: Mar 2010
Location: SE Michigan
Posts: 686
Rep Power: 52
MikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant future
Originally Posted by TheCarDudes View Post
After reconsidering all the info here I opted to go to the following combination:

235/35/19
315/25/19

The other setup I had was too tall and looked terrible on the car. I only chose that combo mainly because the revs per mile and OD was the closest front to back. I knew I would be playing with fire on the rubbing aspect. Furthermore, the new set up looks 1000% better.

Thanks to everyone for posting the info.

Here are the pics:
Let me know how it works. Any psm problems around aggressive turns?
 
  #54  
Old 01-23-2011, 09:02 AM
TheCarDudes's Avatar
Registered User
Join Date: Oct 2008
Location: Thousand Oaks, CA
Posts: 166
Rep Power: 17
TheCarDudes will become famous soon enough
Originally Posted by MikeR397 View Post
Let me know how it works. Any psm problems around aggressive turns?
I will keep you up to date. I have hit just a few turns here and there but have not had a chance to do it safely where the PSM might go off. Too much traffic around. I'll let you know if and when, what speed, conditions, etc.
 
  #55  
Old 01-23-2011, 11:35 AM
Registered User
Join Date: Dec 2008
Location: Phoenix, AZ
Posts: 27
Rep Power: 17
rlj996tt650gt is a name known to allrlj996tt650gt is a name known to allrlj996tt650gt is a name known to allrlj996tt650gt is a name known to allrlj996tt650gt is a name known to allrlj996tt650gt is a name known to all
Thumbs up everyone is right--this question has been addressed numerous times.

When I first went to 19" HREs for my 2002 996TT X-50 there were, as everyone notes, no problems with the rims at all. The wheels and tires I purchased were meant for a 997TT, there were no problems with the front tires but the factory specified rears for the 997TT are or were 305/30/19s--so a higher side-wall aspect ratio and the narrower rear track of the 996TT vs. the 997TT created an issue with the rear tire size. The 996TT with 19" rims called for 315/25/19 (as I recall). The 305s with the 30 aspect ratio rubbed, bottomed out when cornering on anything but the flattest, smoothest of roads--difficult to find. Rubbing tires are not something I find acceptable, enjoyable, or livable in any vehicle but especially with the cornering speeds, adhesion limits, and the generally intense capabilities of these wonderful machines. The rear wheel flairs would have to be modified by someone you really trusted to accommodate tires with a 30 series aspect ratio. While I have folks I trust to do anything to my Turbo it did not seem worthwhile to seriously consider that degree of modification to the rear body panels since there was a huge and immediate market for the 305/30/ZR19 PS2s. I simply bought a new set of 315/25/ZR19s PS2s for the rear wheels. I've had absolutely no problem with this arrangement for the past 8,000 miles.

I don't know about 255/30-19s as a valid option for front tire size--I have not heard of anyone doing that. Which means nothing since there are a great many things I have not heard of. It intuitively feels like there could be serious issues with turn-in. But what the heck do I know about intuition. My front tires are (I think) standard for a 997TT--they are 235/35/ZR19"s and of course the rear tire sizes are dictated by the narrower rear track of my 996TT relative to the 997TT. With absolutely no spacing the 305, 30, ZR19"s were sitting right against the inner fenders. The result being the 315/25/ZR19s. With the lower aspect ratio there's no rubbing whatsoever and there's a relatively massive contact patch on the tarmac. So even with a significantly modified engine it just puts the power to the road and I don't have to watch that painful process of spinning, PS2s $ floating off as smoke into the atmosphere. It hooks up instantly, maintains contact and goes, and just keeps going.
 
Attached Images    

Last edited by rlj996tt650gt; 01-23-2011 at 02:35 PM.
  #56  
Old 01-23-2011, 12:29 PM
Registered User
Join Date: Mar 2010
Location: Boston MA
Posts: 63
Rep Power: 12
dbhajek is on a distinguished road
I wonder why more people don't try 255/30-19 (25.1 diameter) and 315/25-19 (25.2 diameter) combo. Looks like it would also be a perfect combo.
 
  #57  
Old 02-27-2011, 02:29 AM
Registered User
Join Date: Nov 2009
Location: houston, TX
Posts: 1,385
Rep Power: 90
bad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond reputebad107 has a reputation beyond repute
so what is the verdict on this?
 
  #58  
Old 02-27-2011, 03:46 PM
ASLAN's Avatar
Registered User
Join Date: Feb 2011
Location: Orange County, CA
Posts: 1,118
Rep Power: 175
ASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond reputeASLAN has a reputation beyond repute
everyone is right--this question has been addressed numerous times.
When I first went to 19" HREs for my 2002 996TT X-50 there were, as everyone notes, no problems with the rims at all. The wheels and tires I purchased were meant for a 997TT, there were no problems with the front tires but the factory specified rears for the 997TT are or were 305/30/19s--so a higher side-wall aspect ratio and the narrower rear track of the 996TT vs. the 997TT created an issue with the rear tire size. The 996TT with 19" rims called for 315/25/19 (as I recall). The 305s with the 30 aspect ratio rubbed, bottomed out when cornering on anything but the flattest, smoothest of roads--difficult to find. Rubbing tires are not something I find acceptable, enjoyable, or livable in any vehicle but especially with the cornering speeds, adhesion limits, and the generally intense capabilities of these wonderful machines. The rear wheel flairs would have to be modified by someone you really trusted to accommodate tires with a 30 series aspect ratio. While I have folks I trust to do anything to my Turbo it did not seem worthwhile to seriously consider that degree of modification to the rear body panels since there was a huge and immediate market for the 305/30/ZR19 PS2s. I simply bought a new set of 315/25/ZR19s PS2s for the rear wheels. I've had absolutely no problem with this arrangement for the past 8,000 miles.

I don't know about 255/30-19s as a valid option for front tire size--I have not heard of anyone doing that. Which means nothing since there are a great many things I have not heard of. It intuitively feels like there could be serious issues with turn-in. But what the heck do I know about intuition. My front tires are (I think) standard for a 997TT--they are 235/35/ZR19"s and of course the rear tire sizes are dictated by the narrower rear track of my 996TT relative to the 997TT. With absolutely no spacing the 305, 30, ZR19"s were sitting right against the inner fenders. The result being the 315/25/ZR19s. With the lower aspect ratio there's no rubbing whatsoever and there's a relatively massive contact patch on the tarmac. So even with a significantly modified engine it just puts the power to the road and I don't have to watch that painful process of spinning, PS2s $ floating off as smoke into the atmosphere. It hooks up instantly, maintains contact and goes, and just keeps going.

rlj996tt650gt, what spacers are you running? I am about to mount the exact tire sizes on my 04 996TT!
 
  #59  
Old 09-03-2011, 11:20 AM
MikeR397's Avatar
Registered User
Join Date: Mar 2010
Location: SE Michigan
Posts: 686
Rep Power: 52
MikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant futureMikeR397 has a brilliant future
Originally Posted by klvnwee View Post
Any advise on this?
Also am not sure how the 315/25/19 can fit when there is so much rbbing issue with the 295/30/19.
Because the 315/25/19 are 25.2'' tall (ie diameter) and the 295/30/19 tires are 26.0'' tall, so since they are taller tires, they apparantly rub. I was told 25.5'' is the max allowable height for tires on the 996tt. I have no rubbing issue at all with 315/25/19 on the rear. The problem is that TireRack only carrys $540 PS2's in this size, but I did fine some Nitto INVO's on Ebay for $320 each.

Is anyone here running 295/30/19 and 225/40/19 with 997tt wheels on thier 996tt and not having any issues? Are you using spacers? I've seen at least two reports, including one in this thread, of 295/30/19 causing rubbing in the rear b/c they are too tall.
 
  #60  
Old 09-26-2011, 10:32 AM
FLpaindoc's Avatar
Registered User
Join Date: Jul 2006
Location: Orlando, FL
Posts: 304
Rep Power: 27
FLpaindoc is a jewel in the roughFLpaindoc is a jewel in the roughFLpaindoc is a jewel in the rough
I am officially confused. I just got a set of these wheels with the stock size (for 997tt) tires. Would these tires fit my car (996 tt cab '04)? Do I need to get new tires?
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: 997 turbo rims fit 996 turbo?


Join 6SpeedOnline
Visit our Sponsors

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.