Crown

Forum - Thread


    Re: Multiple punctures

    6000 miles sounds too little to me but I don't know too much about the X5 or the SUV ownership experience more generally so I may be mistaken. Maybe some of the other guys here can shed some more light on this? 


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    I had a Boxster S and the rear tyres were worn after 8.000kms (Pirelli) or 10.000 (MIchelin). Ridiculous for road use in spite of the very high temperatures. Suspension Geometry was always as it should be.

    The 911 is much friendlier on the tyres in spite of more weight and generally higher speeds.

    Some cars are just hungrier with their tyres.


    --

    "Form follows function"


    Re: Multiple punctures

    Throt, what is wear pattern like? Even, or to the outside of the tyre?

    The X5 has variable torque distribution between front and rear, I believe. If the rears are slipping for some reason (older tyres) then more torque would go to the fronts.

    I would look into this because, unless you are really pushing it, 6000 miles is too soon.

     


    --
    Costas

    Re: Multiple punctures

    I'm sad to hear about your misfortune. Had a puncture the other day, it is not fun. But perhaps it is for the better now that you have new tires for your track visits


    --

    indeed shifting is ancient technology - so is a fuel burning engine..  I happen to like both :) 


    Re: Multiple punctures

    Atzporsche:

    .... perhaps it is for the better now that you have new tires for your track visits


    +1 Smiley Yeah, I think it could be a blessing in disguise from a safety point of view Smiley I have a Nordschleife trip coming soon: 7-8 Aug 2010 Smiley


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    Aviator:

    Throt, what is wear pattern like? Even, or to the outside of the tyre?

    The X5 has variable torque distribution between front and rear, I believe. If the rears are slipping for some reason (older tyres) then more torque would go to the fronts.

    I would look into this because, unless you are really pushing it, 6000 miles is too soon.

     

    Wear pattern is on the inner of the rear tyre's, I was told this is very normal on 4x4's Smiley..
     

    Thank you for the pointer's, buddy.


    --

    throt

    "I didn't do it"


    Re: Multiple punctures

     

    It could be normal, I am not sure. However, it suggests too much negative camber in the rear.


    --

    Costas


    Re: Multiple punctures

    BTW, how deep should the tread be on a new set of tyres? Seems like mine are intended to be 6mm deep.

    Tyre Treadwear:

    Front Left
    : 6mm (outer), 6mm (centre), 6mm (inner) - Front Right: 5mm (inner), 6mm (centre), 6mm (outer)
    Rear Left
    : 6mm (outer), 6mm (centre), 6mm (inner) - Rear Right: 6mm (inner), 6mm (centre), 5mm (outer)

    --

    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    10/32, not sure how that translates to mm.


    --

    Slow In, Fast Out


    Re: Multiple punctures

    FFaust:

    10/32, not sure how that translates to mm.

    10/32, or 5/16, translates to 8mm.

    But tread depth of new tyres depends on the specific type of tyre. 


    --

    fritz


    Re: Multiple punctures

    I thought it was supposed to be 8mm too so I was a little surprised that my set of 4 brand new tyres were all around 6mm when new.


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    Hmm, odd. I KNOW that Mich Cups are 6/32


    --

    Slow In, Fast Out


    Re: Multiple punctures

    Some observations -

    I have been driving with tyres filled with nitrogen gas for some weeks now. I have noticed some differences.

    At first, the car felt like it was slightly more 'bouncy' and 'riding higher'. This could have been the result of slightly different density between nitrogen and compressed air. As time has gone on, these observations have been less noticeable. From the start, it has felt less bumpy driving over imperfections in the road surface and this good sensation remains. Overall, it's been an improvement  Handling feels sharp and stability is great.

    When I was on the track last weekend at the Nurburgring Nordschleife, I noticed that the tyre pressures rose - but not by as much as they had done previously when filled with compressed air.

    My tyres were at 2.3 bar (front) and 2.7 bar (rear) when cold. When used on track, the tyre pressures (with nitrogen) went up to 2.5 bar (front) and 3.0 bar (rear). With compressed air, the last time I was on track (where the weather and ambient temperature were very similar), the tyre pressures went up to 2.6 bar (front) and 3.1 bar (rear). Not a huge difference but it is still there.

    Fuel economy on longer journeys appears improved - I managed to get a longer range on a full tank of fuel even though I was driving more spiritedly.

    So far, I'm very happy with nitrogen gas

    --

    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    FFaust:

    Mich Cups are 6/32


    That's 5mm which is more like what I measured on my new Michelin Pilot Sport PS2 (N2) tyres.


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    Easy, the lesser increase in tire pressure with temp increase is one of the documented advantages of using N2. I wonder however if your other observations concerning ride comfort might simply be due to the newer rubber. Rubber hardens as it ages and  yours were at least 4 years old if I recall

     


    --

    Slow In, Fast Out


    Re: Multiple punctures

    Sorry to hear about your tire troubles.

    What is N1, N2 etc. Do other cars use some similar system.. 


    Re: Multiple punctures

    Sorry, N2 = Nitrogen.


    --

    Slow In, Fast Out


    Re: Multiple punctures

    FFaust:

    ... I wonder however if your other observations concerning ride comfort might simply be due to the newer rubber. Rubber hardens as it ages and yours were at least 4 years old if I recall

     
    I'm not sure this is the reason - the ride comfort, feeling like 'riding higher' and 'bounciness' were not IMvHO new rubber related sensations. They were IMvHO more related to how the tyres were inflated Smiley


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    yash:

    What is N1, N2 etc. Do other cars use some similar system.. 

     
    N1, N2 etc indicate tyres made for use on Porsche cars with Porsche approval. Each number shows the version of that tyre. See link below for more info:

    Just click on 'Porsche N Specfication Tire Approvals'

    www.tirerack.com/tires/tiretech/tiretech.jsp

    --

    RT Moderator
    - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    FFaust:

    Sorry, N2 = Nitrogen.

     
    I think yash was asking about N1, N2 Porsche spec tyre designations rather than the chemical abbreviation of nitrogen molecules (which as you rightly stated is N2 as well) Smiley

    Just to digress for a moment, this is the reason why nitrogen is supposed to be so good - N2 molecules have a very strong triple covalent bond. They are chemically almost inert since relatively few elements can react with it to open up this triple covalent bond.


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    Aviator:

    I got the tires online from a German company, delti.com. Their site for the UK is, I believe, http://www.mytyres.co.uk/.

    Thanks for that tip, Aviator. Smiley

    I picked up some metal debris which ruined a winter tyre back in the spring and couldn't find a same-brand-and-model replacement at that time on the internet, due to dealers having depleted their stocks at the end of the season.

    I'd resigned myself to not being able to complete the set of Pirelli Sottozeros until October, but I tried the company you named and now have a full stack of them in the garage ready to install as soon as the weather gets cold.  Smiley

     


    --

    fritz


    Re: Multiple punctures

    easy_rider911:

    Just to digress for a moment, this is the reason why nitrogen is supposed to be so good - N2 molecules have a very strong triple covalent bond. They are chemically almost inert since relatively few elements can react with it to open up this triple covalent bond.

     Weeeell, since air 79% percent nitrogen anyway, you'd have to concentrate on the other 21%, which is mainly oxygen, if you want analyse any perceived differences in the feel of tyres filled with pure nitrogen. 

     


    --

    fritz


    Re: Multiple punctures

    Yes, fritz, I'm aware of it Smiley 


    --

     
    RT Moderator - 997.1 Carrera S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen collection

    Rennteam signature photo 2.jpg


    Re: Multiple punctures

    Just updating some info on this thread ....

    Here is a link to a pdf of Porsche OEM wheels and Porsche N-rated tyres (as of Aug 2010) 

    http://www.porsche.com/filestore.aspx/default.pdf?pool=uk&type=download&id=ueberblicksommerreifen2006-11&lang=none&filetype=default

    Strictly speaking, as of Aug 2010, Michelin Pilot Sport PS2 N2 tyres are approved for the 997.1 C2S (Model years 2005-2008) when fitted with SportDesign wheels on the rear axle only.

    They are approved for the front axle with Carrera Sport wheels and Sport Classic wheels

    Front Axle: 8J x 19 inch wheels, 235/35 ZR 19 tyres, load & speed index (87Y)
    Rear Axle: 11J x 19 inch wheels, 295/30 ZR 19 tyres, load & speed index (100Y) XL

    --

    997.1 C2S GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen pickup, BMW Z4 2.5i Roadster Sterling Grey/Red


    Re: Multiple punctures

    Forgot to add - I am just taking the view that N2 tyres are okay


    --


    997.1 C2S
     GT Silver/Cocoa, -20mm/LSD, PSE, short shifter, SportDesign rims, Zuffenhausen pickup, BMW Z4 2.5i Roadster Sterling Grey/Red


     
    Edit

    Forum

    Board Subject Last post Rating Views Replies
    Porsche Sticky OFFICIAL: New 991.2 GT3 (2017) 1/3/19 8:54 AM
    Porker
    416654 5218
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA 12/30/18 7:55 PM
    RCA
    327359 2018
    Porsche Sticky The moment I've been waiting for... 12/8/18 8:33 AM
    Joost
     
     
     
     
     
    214709 1083
    Porsche Sticky OFFICIAL: 911 GT2 RS (2017) 1/14/19 3:36 PM
    Kobalt
    211593 2753
    Porsche Sticky OFFICIAL: 991.2 GT3 RS (2018) 1/14/19 6:40 PM
    ZahirD
    137895 2510
    Porsche Sticky OFFICIAL: The new Porsche 992 – a design icon and high-tech sports car 1/17/19 11:58 PM
    RCA
    39395 542
    AMG Sticky Mercedes E63 S AMG (2018) - Short Review (updated on a regular basis) 1/16/19 10:53 PM
    Leawood911
    39250 383
    Porsche Sticky Paint protection film 9/25/18 6:14 PM
    throt
    15006 121
    Porsche Sticky Child seats in a 991 11/29/18 3:43 PM
    RCA
    14272 35
    Porsche Sticky OFFICIAL: 992 Carrera Cabriolet 1/17/19 3:54 PM
    Lars997M
    4238 43
    Porsche Sticky OFFICIAL: The new Porsche 718 T (Boxster & Cayman) 12/29/18 7:17 PM
    spudgun
    3529 27
    Porsche OFFICIAL: 991 Turbo and Turbo S 1/4/19 7:02 PM
    Topspeed
    485710 4255
    Porsche 992 (Next 911 generation 2019/2020) Thread Closed 11/29/18 11:38 AM
    RCA
    308191 3195
    Porsche OFFICIAL: 911 R (2016) 12/31/18 2:19 AM
    DJM48
    284518 2598
    Porsche Cayman GT4 1/7/19 7:33 PM
    Carlos from SpainM
    271847 2653
    Ferrari 488 GTB/GTS 1/17/19 8:13 PM
    GoHardGT3RS
    194274 1789
    Porsche OFFICIAL: New 991.2 Turbo and Turbo S 1/23/18 12:27 AM
    RCA
    193076 1074
    McLaren McLaren on a winning streak 1/14/19 8:04 PM
    TB993tt
    188223 3331
    Others Audi R8 V10 Plus (2016 model) - Review (updated Feb 13th 2017) 12/17/18 12:42 PM
    RCA
    155525 2491
    Porsche Boxster Spyder (981) 8/31/18 10:25 AM
    WAY
    143996 757
    Ferrari Ferrari F12 Berlinetta / 599 GTO Successor 5/22/18 9:16 PM
    RCA
    112534 789
    Others VW caught cheating emissions tests 5/3/18 7:52 PM
    CGX car nut
    107345 871
    Porsche Porsche Mission E - the future of Porsche? 1/18/19 12:26 AM
    RCA
    94096 1307
    Porsche Donor vehicle for Singer Vehicle Design 12/7/18 10:15 PM
    Boxster Coupe GTS
    68095 673
    Porsche UPDATES: 2018 Porsche Cayenne 2/6/18 2:13 PM
    RCA
    57952 423
    Others Tesla Roadster 1/12/19 11:16 PM
    Boxster Coupe GTS
    51204 1566
    Porsche OFFICIAL: New 991.2 Carrera GTS models 11/3/18 11:09 AM
    bluelines
    47816 477
    Others Tesla Model X Thread Closed 2/23/18 3:41 PM
    RCA
    43248 1122
    AMG AMG GT R 11/30/18 4:10 PM
    RCA
    42721 605
    Lambo Aventador and SV 11/19/18 8:31 AM
    RCA
    40273 472
    272 items found, displaying 1 to 30.