Tyre tread depth for AMCC ART

**Luckylegs** · 24th November 2010, 12:35

Originally Posted by p.dath

I don't know anything about tyres turning blue, but I do know it is not advisable to use tyres older than 7 years.

Yeh, I was somewhat dis-heartened when I realised the Tyre was that old. It obviously sat around for a fair while before being put on the bike as the tyre shows very little wear at all.

Based on the condition of the rubber (that I can see/feel etc) it doesnt seem that hardened or cracked so if it was not for the blueing I would probably feel comfortable doing one more track day on em. Im hardly fast, so Im not pushing tyres to their max anyway.

I'm pricing up replacements now, but, hmmmmm, dunno! I dont know what will be worse, the old tyre on there or a new, unscrubbed one.

Still interesting to know what the ART scrutineers point of view is. Ie Do they specifically look at age or just condition, and if the latter, will this juect be limited to tread depths and no obvious flaws (cracks etc etc)

Bugger!

**p.dath** · 24th November 2010, 13:44

Originally Posted by Luckylegs

Yeh, I was somewhat dis-heartened when I realised the Tyre was that old. It obviously sat around for a fair while before being put on the bike as the tyre shows very little wear at all.

Based on the condition of the rubber (that I can see/feel etc) it doesnt seem that hardened or cracked so if it was not for the blueing I would probably feel comfortable doing one more track day on em. Im hardly fast, so Im not pushing tyres to their max anyway.

I'm pricing up replacements now, but, hmmmmm, dunno! I dont know what will be worse, the old tyre on there or a new, unscrubbed one.

Still interesting to know what the ART scrutineers point of view is. Ie Do they specifically look at age or just condition, and if the latter, will this juect be limited to tread depths and no obvious flaws (cracks etc etc)

Bugger!

New tyres will take hardly any time to "scrub" in. Pretty much only Michelin use mould release compounds these days.

And as I understand it, the risk with tyres more than 7 years old is to do with sudden delamination (aka blowout) while be used.

**sharky** · 24th November 2010, 16:25

Originally Posted by Luckylegs

Came home and checked the date of manufacture tonight and it says 3102 which if I've read correctly means it was made 31st week of 2002. This certainly makes it an old tyre. It doesn't seem too hard though but will this have contributed to the blueing?

The 'blueing' is just the oils coming to the surface and yes it will scrub off, BUT that tyre is far too old so I'd be chucking it if it was me.

**Luckylegs** · 25th November 2010, 11:25

Originally Posted by sharky

The 'blueing' is just the oils coming to the surface and yes it will scrub off, BUT that tyre is far too old so I'd be chucking it if it was me.

Ha! You think thats old. I had naievely thought Oh yeh they'll be about the same age so didnt bother checking the front. Thought I better check that last night and blardy hel, its an '01 so even worse than the rear.

BUGGER!

**p.dath** · 25th November 2010, 11:51

Originally Posted by Luckylegs

Ha! You think thats old. I had naievely thought Oh yeh they'll be about the same age so didnt bother checking the front. Thought I better check that last night and blardy hel, its an '01 so even worse than the rear.

BUGGER!

Best you get those tyres off - before they get you off. The race is on.