Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 1
991 : 2011-2019 0
997 : 2004-2012 1
996 : 1997-2005 31
993 : 1993-1998 5
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 1
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 22
Cayman : 2005- 14
Cayenne : 2003- 2
Macan : 2014- 2
Panamera : 2009- 1
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
MMT
Monza


Joined: 18 May 2011
Posts: 165



PostPosted: Tue Jul 30, 2019 6:00 am    Post subject: Puncture - do I need to replace both tyres. Reply with quote

99 C4
I had a rear puncture that couldn’t be repaired so they fitted a new tyre exact same brand.
Is there any issue fitting a new tyre on the same axle as a part worn tyre and if so how much difference in tread is too much.

What are the potential issues?

I have searched, honest.
Thanks
 
  
View user's profile Send private message
   
yo_clarkie
Spa-Francorchamps


Joined: 14 Feb 2012
Posts: 305



PostPosted: Tue Jul 30, 2019 6:15 am    Post subject: Reply with quote

really good question. I have a spare from the last incident in my shed in prep for the next incident and its 4.5mm of tread. I'd use it with a new one, but if it was less than 4mm i wouldn't, If that makes sense... I'm thinking a 2mm differential is ok Smile
_________________
2003 996 C4S in Silver, Manual, PSE, new in UK, now in New Zealand
Mods so far: K&N induction, Kenwood Navigation and AMP, LN Engineering IMS, fully replaced suspension with new factory parts
 
  
View user's profile Send private message
   
Martin996RSR
Spa-Francorchamps


Joined: 08 Dec 2016
Posts: 356



PostPosted: Tue Jul 30, 2019 5:58 pm    Post subject: Reply with quote

Other than not winning a concourse competition, you're pretty safe. You won't damage the car and you're unlikely to be able to detect the difference in driving it.
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7004
Location: Brighton


PostPosted: Tue Jul 30, 2019 5:59 pm    Post subject: Reply with quote

If they are N rated then you need to fit the same .. not good to have an N rated on one side and a non N rated the other .

Porsche states no more than 3mm difference in tread side to side.
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
MMT
Monza


Joined: 18 May 2011
Posts: 165



PostPosted: Tue Jul 30, 2019 8:39 pm    Post subject: Reply with quote

deMort wrote:
If they are N rated then you need to fit the same .. not good to have an N rated on one side and a non N rated the other .

Porsche states no more than 3mm difference in tread side to side.

Thanks for this.

They’re not porsche rated as such but they are top quality correctly rated tyres. What happens if the tread difference is more than 3mm mate do you have any idea. I’m not sure what the difference is and I don’t have the car at the moment.
 
  
View user's profile Send private message
   
maldren
Suzuka


Joined: 07 Oct 2016
Posts: 1122



PostPosted: Wed Jul 31, 2019 4:41 pm    Post subject: Reply with quote

The tyres will handle differently, you may or may not notice this. They will also have different a rolling radius so they will rotate at different rates, this can affect the diff and PSM.

Further to deMort's comment, you should not mix any different tyre spec on the same axle, especially on a high performance car.
_________________
Mike
2003 996.2 C2 Coupe Arctic Silver
 
  
View user's profile Send private message
   
FRP
Albert Park


Joined: 30 Apr 2014
Posts: 1652
Location: Middlesex


PostPosted: Wed Jul 31, 2019 4:51 pm    Post subject: Reply with quote

In addition to the above. if you have an agressive LSD then the car will not be as it should. You WILL notice!!!

Ask me how i know DOH!
_________________
2002 996tt x50 manual in bassat black - 9eXX
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7004
Location: Brighton


PostPosted: Wed Jul 31, 2019 5:46 pm    Post subject: Reply with quote

Nothing i need to add .. i'm becoming redundant Very Happy
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
FRP
Albert Park


Joined: 30 Apr 2014
Posts: 1652
Location: Middlesex


PostPosted: Wed Jul 31, 2019 6:44 pm    Post subject: Reply with quote

Never Ian never
_________________
2002 996tt x50 manual in bassat black - 9eXX
 
  
View user's profile Send private message
   
MMT
Monza


Joined: 18 May 2011
Posts: 165



PostPosted: Wed Jul 31, 2019 8:00 pm    Post subject: Reply with quote

Last week on a spirited run the right rear sounded like a knackered CV joint.
It turns out it’s a spring off one of the brake shoe retainers had pooped off and was randomly catching in the brake shoe. This is the second time I’ve had this happen on the same wheel. I was wondering if I’d got too much difference in the rolling circumference but when I checked the tread depth there’s not that much between the two.
When it happened last time I was on the M1 and the handbrake started banging and I thought the prop was going to drop off.
Anyway, thanks guys for the help.
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7004
Location: Brighton


PostPosted: Thu Aug 01, 2019 5:00 pm    Post subject: Reply with quote

Thats a little worrying as this should not happen and can cause a lot of damage when it does .

i assume new springs have been fitted to the shoes ?

When adjusting the handbrake shoe then do it up tight then wind it off 3 turns with a screwdriver .. these cars dont like the shoes being too close to the drum .

i would also have a good look at the drum part .. any badly rusted spots which could cause a high spot and grab the shoes and it needs a good sanding down .
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
MMT
Monza


Joined: 18 May 2011
Posts: 165



PostPosted: Thu Aug 01, 2019 8:29 pm    Post subject: Reply with quote

deMort wrote:
Thats a little worrying as this should not happen and can cause a lot of damage when it does .

i assume new springs have been fitted to the shoes ?

When adjusting the handbrake shoe then do it up tight then wind it off 3 turns with a screwdriver .. these cars dont like the shoes being too close to the drum .

i would also have a good look at the drum part .. any badly rusted spots which could cause a high spot and grab the shoes and it needs a good sanding down .


When it happened last time it was done by a recognised Porsche specialist and they fitted new parts. This time I’ve taken it to my local garage that I’ve used for my other cars for the past 20 years. They’ve fitted all new parts again.
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7004
Location: Brighton


PostPosted: Fri Aug 02, 2019 7:31 pm    Post subject: Reply with quote

It's rare to happen once .. to happen twice though .. hmm ..

If a customer said this to me i would be checking it in fine detail to try and find a cause .

All i can say is we had a run of three Boxsters in a month .. slightly different but basically the same thing as yours and on two of them it destroyed the hub .. one of them locked the wheel solid .

Only three though.

Perhaps point it out to your garage .

Some things worry me ... it may well be fixed now as it was human error the first time ..

But .. i always point out what i think regardless .
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
MMT
Monza


Joined: 18 May 2011
Posts: 165



PostPosted: Sun Aug 04, 2019 11:58 pm    Post subject: Reply with quote

I will nip and see them in the morning. Appreciate your comments. Thanks
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum