CR500s delaminating

[alan c smith]

My CR500s , 3 years & 2700 miles old, have started to delaminate. Took them to CC Dartford as they supplied them new with the car. They said that this was not a problem and to carry on using them. Anyone else had this happen and are they still safe?

 

 

alan

[k80rum]

Hi Alan.

I have CR500s of this sort of age and mileage and haven't had any delamination occur. I don't want to be alarmist but I would't consider it a normal occurance in a tyre.

 

I'm sure you'll get several useful responses on here but it may also be worth contacting Avon Racing division directly - they've always seemed extremely helpful in the past and it might give you more ammo to go back to Caterham with, should you need to.

 

Their details are:

 

Avon Tyres Racing

Bath Road

Melksham

Wiltshire SN12 8AA

01225 703101

 

or email: avonracing@coopertire.com

 

All the best,

 

Darren E

K80RUM Superlight R #54

 

 

 

Edited by - k80rum on 26 Apr 2005 14:29:44

[alan c smith]

Hi Darren,

 

Thanks for a swift responce. I will give Acon a call.

 

Regards

 

alan

[Graeme Smith]

Is it delaminating in a strip across the tyre? If so, this is where the tread overlaps where it's put on. If you've fitted the tyre so "rotational direction" is correct, hard braking can open this seal up - racers put CR500 on backwards at the front to prevent this happening, i.e. hard braking seals the join. (On the rear the major force is acceleration - which again seals the join is the tyres are fitted as recommended).

[k80rum]

That's cunning

 

Darren E

K80RUM Superlight R #54

 

 

[F355GTS]

here is what happened to an Avon tyre (not a CR500) on my Son's car after it delaminated

 

I would suggest you change them

 

Mark

[SLR No.77]

Is it being suggested that this could occur under normal conditions of use ?

 

Stu.

[Stuart Faulds]

Mark, did Avon confirm that your Son's tyre failure was due to delamination? It looks to me very much as if it's had an impact a the point on the rim where there are 2 little marks, and the tread itself had stayed entirely intact apart from the cuts across it (which are fairly common on avons).

[alan c smith]

Thanks for all the replies. I am sending the tyres back to Avon for inspection. Will post their response on here.

 

alan

[alan c smith]

Graeme, CC told me about reversing the front tyres but said this should only be done with later versions of my tyres and not mine or earlier versions.

 

Mark, just had a look at the cuts on your sons tyre. They look very similar to mine.

 

Stuart, are you saying that these cuts are acceptable? CC told me they were.

 

Regards

 

alan

[Stuart Faulds]

Alan,

 

We see it from time to time, although with the latest CR500's it tends to be diagonal lines. They tend to do it quite quickly and then never get any worse - Avon tell us it's not a problem, and laptimes and lifespan confirm this.

 

The only time I've seen proper delamination is with running wets or really soft slicks too hard in the dry, or once when we did some tyre testing for another manufacturer. It looks much worse than that, and is very obviously wrong.