Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 01-07-2010, 01:15 PM   #1
Registered User
 
Join Date: Jun 2009
Location: Cambridge
Posts: 2
Question N Rated tyres, are they needed?

Hi

Sorry to sound like a pikey but i recently bought 2 new tyres for my boxster which had good ratings and were a mid range brand. They were half the price of the michellin pilots that were on it but the company that i purchased them from said they had to be N rated as its a porsche. I had bought these tyres for my s2000 2 years before and they were great but not N rated even though the S2000 was faster and had better brakes. Just wondering of anyones thoughts on this. Its a 98 so its not under warrenty as i know it can effect this but not sure about the insurance side. Thanks guys
Smootholdboy is offline   Reply With Quote
Old 01-07-2010, 02:09 PM   #2
Registered User
 
Join Date: Sep 2006
Location: California
Posts: 713
In my opinion, the "N-rating" is not really needed...

What kind of tires are they?
__________________
http://farm4.static.flickr.com/3420/...90927559_o.jpg

Some stuff for sale: M030 S 24mm front sway bar, M030 base 19.6mm rear sway bar, 996 GT3 OEM Porsche Motorsport front strut mounts monoball "camber plates"

WTB: looking for some 5-7mm spacers with extended bolts
chaudanova is offline   Reply With Quote
Old 01-08-2010, 08:57 AM   #3
Registered User
 
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
Porsche puts N rating on the tires of the tire companies they are in bed with. If they don't have some sort of contract with a tire company then they don't recommend their tires. In my opinion most of the N rated tires are over-priced and don't deliver the kind of performance available from several non N rated tires.
__________________
'03 3.2L GuardsRed/Blk/Blk---6Spd
Options: Litronics, 18" Carrera lights, Bose sound, Painted to match roll bars.
http://i100.photobucket.com/albums/m...Mautocross.jpg
Adam is offline   Reply With Quote
Old 01-08-2010, 09:04 AM   #4
Registered User
 
Join Date: Mar 2006
Location: Orlando, FL
Posts: 998
only other reason I can think of for having N rated tires is if your car is still under factory warranty... just speculating.
__________________
kabel

Orlando - 99 BMW M Coupe (autocross toy), '11 Mazdaspeed 3 (dog hauler), '99 10AE Miata (the new daily driver)
kabel is offline   Reply With Quote
Old 01-08-2010, 09:08 AM   #5
Registered User
 
Join Date: Jul 2009
Location: Arlington Heights, IL
Posts: 1,557
Whatever you decide, don't have mixed tires mounted on your car.
Flavor 987S is offline   Reply With Quote
Old 01-08-2010, 09:21 AM   #6
Registered User
 
Join Date: Jun 2005
Location: Surf City, NC
Posts: 1,079
Porsche believes that tires are too important to their cars' performance to not have a say in the tires. You'll notice in the tire TSB that the manufacturers do not have a blanket N rating for all their tires.

That said, the manufacturers that do not work with Porsche on their tires could well have as good or better tires than those that do and that have N ratings.

The ratings change periodically and some drop off the list while others are updated as N1, N2, etc.

The design of a tire for a front wheel drive/front weight biased car could logically not work as well as for a rear drive/rear weight biased car.

You also must have a tire rated for the top speed of your vehicle, at least at time of manufacture.

Tire Rack is a good place to do research even if you buy elsewhere. Both their own testing & ratings and user reviews.
__________________
Mike
04 Boxster S - Basalt/Savanna, 6sp, Carrera lites, hardtop
70 914-6 - Black over tan, original/stock
PCA since 1970
70Sixter is offline   Reply With Quote
Old 01-08-2010, 11:34 AM   #7
Registered User
 
Join Date: Oct 2008
Location: San Diego
Posts: 434
I think top speed is the point worth arguing. If I had occasion to drive my 986 at 150+ mph, I might be more inclined toward N-rated tires. Since my driving is principally on the road, with occasional autocross, I don't buy N-rated tires.
__________________
1999 Carrera 4 Aero kit 4" UD Pulley
My Corvette doesn't leak oil... it sweats horsepower.
sd_boxster is offline   Reply With Quote
Old 01-08-2010, 01:00 PM   #8
Registered User
 
Join Date: Apr 2009
Location: Bothell, WA
Posts: 279
Something I read in the past indicated that N rating helped Porsche ensure consistency - some brands would change the formulation of the tires without changing the model number, and then when owners went to replace just their rears, the car would no longer handle properly.

-james
__________________

'01 Boxster S, 51k miles
'05 Mazda 6 Grand Touring Wagon
yimmy149 is offline   Reply With Quote
Old 01-08-2010, 08:18 PM   #9
Registered User
 
Join Date: Jul 2009
Location: Clarksville, TN
Posts: 54
Regarding the insurance question, I ran into this years ago when I was buying tires for my 1994 Cobra that came with Z rated tires. The tire store told me that my insurance company would not allow me to replace the tires that were not rated for 150 mph and would cancelled my policy. Being the inquiring person that I am, I called my insurance agent that told me that they did not have any such requirement and if they caufght me going 150 mph they would cancell my policy. Needless to say I did not return to that tire store.
__________________
03 Boxster Arctic Silver Tiptronic 17" wheels Crios mod over 81k mikes
HDManny is offline   Reply With Quote
Old 01-08-2010, 11:55 PM   #10
Registered User
 
Join Date: Aug 2005
Location: malibu
Posts: 46
My mechanic at the dealer said the N-rated tires have to go through more QA processes than the same non-N-rated tires from the manufacturer. I've also read that the N-rated tires may have stiffer sidewalls than their non-N-rated counterparts.

Not all N-rated tires are high speed. The N-rated tires that came on my Cayenne only have a "V" speed rating (only good up to 150 MPH); they are rated for mud and snow. The summer rated tires that are N-rated are good for higher speeds ("Z" rating)
geoff is offline   Reply With Quote
Old 01-09-2010, 08:42 AM   #11
Registered User
 
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
All I'm going to say is if you have N rated summer tires on your Porsche now, you could be doing better if you value high performance. The best summer tires out on the market right now do not have N ratings.
__________________
'03 3.2L GuardsRed/Blk/Blk---6Spd
Options: Litronics, 18" Carrera lights, Bose sound, Painted to match roll bars.
http://i100.photobucket.com/albums/m...Mautocross.jpg

Last edited by Adam; 01-09-2010 at 08:48 AM.
Adam is offline   Reply With Quote
Old 01-10-2010, 03:52 PM   #12
Registered User
 
dallison's Avatar
 
Join Date: Mar 2009
Location: here
Posts: 243
i have teh sumitomo htz II on mine and i saved a lot of money.
dallison is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:58 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page