[kil0ran]

Got these tyres with a used set of wheels, I’m guessing they’re toast and will kill me if I so much as chuck my leg over the top tube? Caused by being stored flat perhaps? They’re inflated to spec and seller claimed under 500 miles of use.

Topic

[Chris Southby]

I have a pair of these tyres

I have a pair of these tyres and one of them has the same issue, cracked almost the entire circumference only six months old and put straight on the bike when purchased. Bike is always stored with wheels off the ground and ridden 5 days / week. More like a manufacturing fault I think. The other tyre bought at the same time is fine.

[IanMSpencer]

That sounds like being ridden

That sounds like being ridden very under-inflated. If they are under-inflated then the sidewall will be flexed beyond its design limit.

[kil0ran]

Not sure as I bought the

Not sure as I bought the wheels secondhand. My money is on them being stored mounted and flat. The cracking on the rear was all the way round though, on the shoulder of the tyre. I think they’re dual compound tyres so I wonder if it was a manufacturing defect. Still, no bother, seller gave me a partial refund and I’ve got a used set of Conti GP5000s on the way.

[matthewn5]

That’s really odd, I have a

That’s really odd, I have a number of the older Rubino Pro model that are still in perfect nick. Did they get cooked by being in the sun or by a radiator?

[IanMSpencer]

Two problems can cause
Two problems can cause premature tyre aging – light and heat. If tyres are stored in a shed they can get cooked in the summer and off they are near a window, the sun can damage them. Having said that, I suspect compounds like Black Chilli might have a limited shelf life and Conti say they should be no more than 3 years old.

Tyres stored in nice dark cool garages last for years, although,as mentioned below, a good idea to avoid them sitting under-inflated on a bike.

I keep my spares in a box at the back of the garage and some are quite old without suffering. I’m sure I’ll find a use for a 23mm one day.

[Simon E]

Probably spent too long sat

Probably spent too long sat in a garage at low pressure.

I’m good at getting use out of things long after others would have thrown them away but I wouldn’t be entirely comfortable riding any distance on those.

[Dingaling]

That could be the case but

That could be the case but when I had my gravel bike built in 2019 I gave the bike shop builder some old Conti 4 Seasons to put on the bike because there was plenty of life left in them. They had been bought in Sept. 2012 and Mar. 2014 so, when the wheels were 2 years old, the tyres were 7&9 years old.

[mdavidford]

Are they made of cheese?

Are they made of cheese?

[Steve K]

I thought you were just

I thought you were just telling us they were really good tyres, Wallace and Gromit style.

[kil0ran]

Based on the wheels they came

Based on the wheels they came with they’re 2-3 years old (OEMs from a Bianchi Oltre)

[Dingaling]

They may have only done 500

They may have only done 500 miles but then my guess is that they are old. I have Vittoria Corsa Graphene 2 and no such cracking after 4800km.

[kil0ran]

Pic

Pic (should add that the crack is pretty much round the entire circumference

[Author]

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