When to change tyres on a Classic ?
When to change tyres on a Classic ?
Author
Discussion

ChrisW.

Original Poster:

7,944 posts

276 months

Thursday 11th June 2020
quotequote all
I have owned a '73 911 2.4s for a long time ... but the tyres were on the car when I bought it and look like this






No date was visible ....

Would you have changed them ?

Orangecurry

7,749 posts

227 months

Thursday 11th June 2020
quotequote all
...about ten years ago.

Orangecurry

7,749 posts

227 months

Thursday 11th June 2020
quotequote all
Let me rephrase that.

If it never moves, don't bother.

And a small tear trickles down the cheek of everyone who'd love to be driving it hehe

g7jhp

7,022 posts

259 months

Thursday 11th June 2020
quotequote all
Cost of tyres v Value of Porsche = New Tyres.


Speedgelb

873 posts

174 months

Thursday 11th June 2020
quotequote all
Are those the DOT codes that say 4582? If so they're 37 years old!

Have experience of some Continentals that had around 4mm, but were five years old, and had 'gone off'. My face looked like this confusedeek , when I unintentionally drifted my new-to-me Porsche round a roundabout in mildly damp conditions biggrin

The tyres were replaced with some new Goodyears soon after.

996Targa

267 posts

167 months

Thursday 11th June 2020
quotequote all
This was the Porsche list as of 2016.


Maph7

43 posts

124 months

Thursday 11th June 2020
quotequote all
Replace them.

Cracking is never a great sign, in between tread I can accept within reason, sidewalls are a no no.

I have gone years without even a puncture to having a blow out and two tyre failures in the last 18 months......both failures started with cracking in the side wall and ended up with rapid deflations (sidewall ripped away from tread)..... both Goodyears, both less than 5 yrs old and both with 3mm + of tread left on them.....on different cars.

I work on the basis of replacing at 10yrs regardless of mileage on my classics.

ChrisW.

Original Poster:

7,944 posts

276 months

Thursday 11th June 2020
quotequote all
Thanks all, it was a bit of a trick question because the tyres were all MOT passes, had hardly any wear and in soft light the cracks did not really show.



Their date was 2004 !!



The outside was cracking like this with some persuasion .. such as cornering ....



Whilst the inside that had not been affected by sunlight looked like this ...

ChrisW.

Original Poster:

7,944 posts

276 months

Thursday 11th June 2020
quotequote all
I had wondered whether or not to replace them ... I am very pleased that I did.

For the record, Protyre in Leeds did a fantastic job dealing with the surprise that the rims required tubes ... a rapidly and professionally re-gained art, just for me.

How many people does it take to fit a tyre ? More than you can ever imagine if they are tubeless and so tight on the rim .... !!

PH5121

2,007 posts

234 months

Friday 12th June 2020
quotequote all
Glad to hear you got them replaced.

I replaced some 26 year old tyres on one of my cars earlier in the week. It had done only 4k miles in that period and there was no evidence of cracking, but they had gone very hard.

OFORBES

535 posts

121 months

Friday 12th June 2020
quotequote all
I was looking at this yesterday.

I have a 2004 Ph2 Clio V6 with 11k miles sat on its original Michelins. The walls near the tread are cracked. After reading this I am definitely going to replace them.

The car along with my others will probably only do a few hundred miles a year.

V8fan

7,536 posts

289 months

Friday 12th June 2020
quotequote all
Speedgelb said:
Are those the DOT codes that say 4582? If so they're 37 years old!

Have experience of some Continentals that had around 4mm, but were five years old, and had 'gone off'. My face looked like this confusedeek , when I unintentionally drifted my new-to-me Porsche round a roundabout in mildly damp conditions biggrin

The tyres were replaced with some new Goodyears soon after.
It's not a date code if they're that old. Date codes only became 4 digit after 2000.

I have seen tyres on a Jag at a classic auction (restored) which was mint, except for the tyres. They were 3 digit with a triangle at the end; they were at least 24 years old!

Mighty Flex

920 posts

192 months

Friday 12th June 2020
quotequote all
Not all tyres age equally, and they can fail in different and strange ways.

I have driven a car on 30year old tyres, barely worn with no cracks, looked great, and no runout. Car passed it's MOT. It was like driving on a cobbled road, it rained on the way back from the MOT and was struggling to get up a steep hill without spinning the wheels. I knew they wouldn't be good and were being changed anyway, but was surprised just how bad. They were changed very quickly!

A friends got some cookie cutters for his 924 with tyres. Again they looked fine, but suffered a complete sidewall failure and blowout halfway down the road.

More genrally, almost all properties will be negatively affected, but structural failure (not necessarily visible as cracking on the outside) and wet grip are the two that could easily cost you a lot more than a set of new tyres.

Orangecurry

7,749 posts

227 months

Friday 12th June 2020
quotequote all
ChrisW. said:
Thanks all, it was a bit of a trick question because the tyres were all MOT passes, had hardly any wear and in soft light the cracks did not really show.

Their date was 2004 !!
I am the awesomest.

Orangecurry said:
...about ten years ago.
I had some 1997-stamped Uniroyals on the back of the BMW until a few years back. Again I hardly drove the car. They seemed great in the dry. Passed the MOT. When I took it out in the wet however.....redcard


hot66

700 posts

238 months

Friday 12th June 2020
quotequote all
ChrisW. said:
I had wondered whether or not to replace them ... I am very pleased that I did.

For the record, Protyre in Leeds did a fantastic job dealing with the surprise that the rims required tubes ... a rapidly and professionally re-gained art, just for me.

How many people does it take to fit a tyre ? More than you can ever imagine if they are tubeless and so tight on the rim .... !!
'72 / '73 fuchs don't require tubes , they are designed for tubless and have the safety bead What date stamps on your wheels ? Do you have 'flat' 6x15 ?


Edited by hot66 on Friday 12th June 12:15

ChrisW.

Original Poster:

7,944 posts

276 months

Sunday 14th June 2020
quotequote all
A good question ...

I have not looked at the dates on the wheels but I was told by Canford Classics that my wheels are from an older 2.2 ... the have a petal shape where the valve enters the wheel.

Does that make sense ? smile


SRT Hellcat

7,195 posts

238 months

Monday 15th June 2020
quotequote all
They are probably deep 6's that will require a tube inside the tyre

BertBert

20,770 posts

232 months

Monday 15th June 2020
quotequote all
the week 14 2017 front tyres on the Zoe have cracked on the edge of the tread (not the sidewall). Impressive after 3 years!

blackmamba

833 posts

257 months

Monday 15th June 2020
quotequote all
ChrisW. said:
A good question ...

I have not looked at the dates on the wheels but I was told by Canford Classics that my wheels are from an older 2.2 ... the have a petal shape where the valve enters the wheel.

Does that make sense ? smile
Sounds like they are deep 6s with hearts which are likely to require tubes. Any more details on the car? A lovely thing like that should be wearing the correct wheels ( - :