Tyre Cracking

Leprechaun77

I'm looking for opinions on the degree of 'tyre cracking' that is deemed ok/safe.

I have four tyres which are between 3.2mm - 4.3mm tread depth. These tyres are on the car since new, July 2007 (manufactured May 2007). Whilst there is sufficient tread depth, there appears to be some shallow cracking all around the outside segment, and in the first tread crevice, which is obviously due to their age. They have covered about 40,000kms in their lifetime and have no other cracking elsewhere.

From what I gather, tyres last about six years from manufacturing date, tread depth aside. I understand that it is prudent to change cracking tyres, but at what stage is cracking serious?

Nissan doctor

Leprechaun77 wrote: »

I'm looking for opinions on the degree of 'tyre cracking' that is deemed ok/safe.

I have four tyres which are between 3.2mm - 4.3mm tread depth. These tyres are on the car since new, July 2007 (manufactured May 2007). Whilst there is sufficient tread depth, there appears to be some shallow cracking all around the outside segment, and in the first tread crevice, which is obviously due to their age. They have covered about 40,000kms in their lifetime and have no other cracking elsewhere.

From what I gather, tyres last about six years from manufacturing date, tread depth aside. I understand that it is prudent to change cracking tyres, but at what stage is cracking serious?

I bet they are Michelin tyres....

I wouldn't be worried about the cracking in the pics.

Leprechaun77

Nissan doctor wrote: »

I bet they are Michelin tyres.....

They are indeed Michelin tyres....well spotted.

Thanks for the advice...much appreciated. The wife should hopefully get another two years out of them so . They seem to have lasted quite well.

Nissan doctor

Leprechaun77 wrote: »

They are indeed Michelin tyres....well spotted.

Thanks for the advice...much appreciated. The wife should hopefully get another two years out of them so . They seem to have lasted quite well.

I'll hazard another guess and say its a ford focus?

Michelin tyres are the worst culprits for cracking like that, they usually show cracks, not only quicker then other brands but usually well before the 6 year manufacturer limit.

fabsoul

40,000km on them its time for a new set then.

Leprechaun77 wrote: »

I'm looking for opinions on the degree of 'tyre cracking' that is deemed ok/safe.

I have four tyres which are between 3.2mm - 4.3mm tread depth. These tyres are on the car since new, July 2007 (manufactured May 2007). Whilst there is sufficient tread depth, there appears to be some shallow cracking all around the outside segment, and in the first tread crevice, which is obviously due to their age. They have covered about 40,000kms in their lifetime and have no other cracking elsewhere.

From what I gather, tyres last about six years from manufacturing date, tread depth aside. I understand that it is prudent to change cracking tyres, but at what stage is cracking serious?

Leprechaun77

Nissan doctor wrote: »

I'll hazard another guess and say its a ford focus?

You should have quit while you were ahead .

They are 225/45/17 Michelin Pilot Primacy from a Type-S Civic.

Leprechaun77

fabsoul wrote: »

40,000km on them its time for a new set then.

If there is plenty of tread left, then why change?

My only concern was that the tyres themselves needed to be retired based on age.

E39MSport

Nissan doctor wrote: »

I bet they are Michelin tyres....

I wouldn't be worried about the cracking in the pics.

Freak

Nissan doctor

Leprechaun77 wrote: »

If there is plenty of tread left, then why change?

My only concern was that the tyres themselves needed to be retired based on age.

No need to change based on any specific mileage.

You haven't got long left really on two though as once you go below 3mm, especially on wider tyres, the grip levels are vastly reduced.

mb1725

Nine posts on cracked tyres and nobody mentions Dana??

OldmanMondeo

Tyres do have a life time span as well. With the last few winters we have had, I would have these checked out by someone who knows their stuff. From what I remember being told, by Michelin, the life span is 4 - 5 years.

dharn

what about the all the old ladies with 10 year old fiestas etc with 30000 miles on them and the original tyres on them and the spare in the boot never used should their tyres be changed every 6 years ??

fabsoul

dharn wrote: »

what about the all the old ladies with 10 year old fiestas etc with 30000 miles on them and the original tyres on them and the spare in the boot never used should their tyres be changed every 6 years ??

the spare would prob be ok if it was covered, maybe not 6 years but deff by 10 years yes

Nissan doctor

dharn wrote: »

what about the all the old ladies with 10 year old fiestas etc with 30000 miles on them and the original tyres on them and the spare in the boot never used should their tyres be changed every 6 years ??

Yes as the rubber will be badly perished if the are that old.

Its an nct fail advisory, not refusal though.

E39MSport

dharn wrote: »

what about the all the old ladies with 10 year old fiestas etc with 30000 miles on them and the original tyres on them and the spare in the boot never used should their tyres be changed every 6 years ??

My 91 motor came to me last year with the original tyres that came out of the factory in excellent condition (previous owner had used his own wheels). The spare had never even been on the road. Binned ... but understandable

_Conrad_

dharn wrote: »

what about the all the old ladies with 10 year old fiestas etc with 30000 miles on them and the original tyres on them and the spare in the boot never used should their tyres be changed every 6 years ??

Well if the tyres are perished and cracking then unfortunately yes.