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Rain tires and date stamps

#1 User is offline   jesse v Icon

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Posted 26 May 2019 - 06:01 AM

My front Pirelli rain tire has a date stamp of 4914 (late 2014). Should this be considered dead of old age? I lost the front in T8 last weekend... Not saying this caused it, but it got me thinking.
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#2 User is offline   Stettnichs Icon

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Posted 26 May 2019 - 10:37 PM

I am by no means a tire expert, but I believe if the tire was stored correctly, has adequate tread left, and still feels pliable/sticky, I would have confidence running it.

I think heat cycles have more to do with tires getting worn out than just the age of the tire. Since rains are ideally kept cold anyway, I would say they should be good yet.

Just my $0.02. I'm sure someone that knows tires well will correct me if I'm wrong!
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#3 User is offline   spargo19 Icon

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Posted 28 May 2019 - 09:13 AM

100% depends on how it was stored. I keep stuff like that in black sealed plastic bags. Truly sealed cool tires have a very long lifespan.

Also, I've found that when tires get 'old', it's really just the surface that skins over, and a good heat cycle on an abrasive track can bring you back to good rubber.

I'm a little more desperate than most, as the dunlops for my 400 are no longer manufactures, so I'm willing to push the envelope a little bit. :D
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#4 User is offline   jesse v Icon

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Posted 29 May 2019 - 07:25 AM

Ok, thanks. Itís never been exposed to sub freezing temps (except maybe once in a u-haul for a couple days); always indoors during the off season.
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Posted 29 May 2019 - 08:27 AM

View Postjesse v, on 29 May 2019 - 07:25 AM, said:

Ok, thanks. Itís never been exposed to sub freezing temps (except maybe once in a u-haul for a couple days); always indoors during the off season.


and last race weekend.
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#6 User is offline   Champ Icon

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Posted 29 May 2019 - 09:26 AM

I think it's almost easier to tell with rain tires vs. slicks - if they are still pliable to the touch you SHOULD be alright. I had a 6 year old set of Michelin's once upon a time and to the touch it was obvious I would crash leaving my pits.

That said, as usual, a new set of tires is cheaper than repairing crash damage.

But THAT said, if you have no other rain tires, old ones will still get you on the grid but you need to take into account what you are workin with.
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#7 User is offline   spargo19 Icon

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Posted 29 May 2019 - 12:33 PM

View PostChamp, on 29 May 2019 - 09:26 AM, said:

I think it's almost easier to tell with rain tires vs. slicks - if they are still pliable to the touch you SHOULD be alright. I had a 6 year old set of Michelin's once upon a time and to the touch it was obvious I would crash leaving my pits.

That said, as usual, a new set of tires is cheaper than repairing crash damage.

But THAT said, if you have no other rain tires, old ones will still get you on the grid but you need to take into account what you are workin with.


Lap or two of cool dry scrub would probably do them loads of good. :)
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Posted 29 May 2019 - 12:57 PM

View Postspargo19, on 29 May 2019 - 12:33 PM, said:

Lap or two of cool dry scrub would probably do them loads of good. :)

One of the perks of running a bike with a common tire size is being able to buy new tires for it ;)

Think I gave these to a local racer who was gonna use them for flat track on his dirt bike....was years ago
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Posted 29 May 2019 - 03:36 PM

View Postjesse v, on 29 May 2019 - 07:25 AM, said:

Itís never been exposed to sub freezing temps (except maybe once in a u-haul for a couple days); always indoors during the off season.



View Postb-rogers, on 29 May 2019 - 08:27 AM, said:

and last race weekend.


Best reply so far. :rockwoot:
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