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What is the shelf life of an unridden 700x23 tire?

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

What is the shelf life of an unridden 700x23 tire?

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Old 01-16-06, 09:22 PM
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What is the shelf life of an unridden 700x23 tire?

eg
Conti Grand Prix 3000 or 4000?
Michelin Pro 2 Race?
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Old 01-16-06, 09:40 PM
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An engineer at Continental once told me that you shouldn't keep car tires longer than 10 years. I assume the same would hold for bike tires.
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Old 01-16-06, 09:41 PM
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How will you know the manufacturing date of the tire? That is when the shelf life starts.

But as to a number I have no clue.
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Old 01-16-06, 09:42 PM
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I buy tires on sale and stock up from time to time and have used tires I've had "on the shelf" for 2 to 3 years without problems. This includes Panaracer Stradius and Vittoria RubinoPros brands. Hardly scientific, but there you have it.
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Old 01-16-06, 09:49 PM
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I would think the conditions under which they are stored might have some bearing on how long they would last. Certainly between the 3 and 10 years mentioned makes sense. I think I read somewhere that ozone can cut the life of tires. Not only from the atmosphere but from machinery nearby. I would also think keeping them outside in a shed where they could go way below zero can't help. I'm also curious and hopefully someone can shed more accurate information.
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Old 01-16-06, 09:50 PM
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Originally Posted by CPcyclist
How will you know the manufacturing date of the tire? That is when the shelf life starts.

But as to a number I have no clue.
There is a code on the sidewall that tells the month and year of manufacture, but you have to call them to find out what it means.
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Old 01-16-06, 10:20 PM
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well the disco head wrench (i forget his name off the top of my head) ages the tubulars for something like 5-6 years before the team uses them. until you see dry rot id imagine its fine to use. heck its not terribly uncommon for bikes to get pulled out of sheds after sitting for 10-15 years and the tires still at least having a little life in them.
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Old 01-16-06, 10:28 PM
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As posted above, storage conditions have a lot to do with "shelf life." Certainly exposure to UV and ozone would speed deterioration. I have kept tires for up to 2 years stored inside in closed container.
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Old 01-16-06, 11:31 PM
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I watched sme documentary about lance armstrong and they took a walk into a room that was FULL of tires and the guy (I think it was his trainer) said they onlyuse tires that are a 3 or 4 years old... not sure why... but they had some reason why they never used new tires.

Would be interested to know why but my attention span didn't span quite far enough.

Rock
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Old 01-16-06, 11:32 PM
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it should also be noted the tires were literally stacked everywhere... not in containers...a nd ti was just in some shack looking room, didn't appear to be climate controlled and was very messy.
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Old 01-16-06, 11:40 PM
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Originally Posted by DamnRock
it should also be noted the tires were literally stacked everywhere... not in containers...a nd ti was just in some shack looking room, didn't appear to be climate controlled and was very messy.
Yeah, we pbly overanalyse this stuff (speaking for myself). Need to get more sleep to be better rested instead. I GOTTA go to bed. Love the conversation though

To be continued.
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Old 01-16-06, 11:42 PM
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Looks like I'll be ordering some Conti GP 4000's from GB.
See sep thread re color:
http://www.bikeforums.net/showthread.php?t=166882
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Old 01-16-06, 11:43 PM
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I remenber the thread on the discovery channel during this years tour with the older Team Discovery mechanic discussing of he ages tubulars and he had some that were aged for three years before they were stretched and prepped for mounting on wheels. Some were a year old and others upto three years. They were kept in a cool dark room.

"So, what a delight to hear from Christo that for at least the last seven years, a mechanic has been reverently aging a set of tubular tires for the entire team. That's exactly the age of a stash of tubulars I have been holding in reserve, sort of in honor of past glory and in hope of some kind of renaissance. Like wine, these tubular tires improve with age. They've never even been stretched on a rim, let alone ridden. It's worth the wait, though, because something wonderful happens to the rubber over time and they're like magic on the road. They grip corners like glue, and the ride is so smooth. With just a little imagination, I'm there."

Check this link and scroll over to the picture of Julien the Discovery Team mechanic a sub title for "tires aged to perfection" will pop up. Click on Julien's picture and enjoy.
http://team.discovery.com/videogalle...r/popular.html

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Old 01-16-06, 11:45 PM
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Originally Posted by gm1230126
I remenber the thread on the discovery channel during this years tour with the older Team Discovery mechanic discussing of he ages tubulars and he had some that were aged for three years before they were stretched and prepped for mounting on wheels. Some were a year old and others upto three years. They were kept in a cool dark room.
Ah, good use for our basement

Bikes and wine are healthy European influence eh?
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Old 01-16-06, 11:50 PM
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You've posted several posts about tires lately. I don't think I've ever given tires so much thought.

MEC sells Conti 1000s for $13 each, they are the cheapest tires I can get ahold of, and so that's what I buy. I also need folding tires for my events, and it happened that MEC had Hutchison folders on sale, which I bought. Later, in the middle of the night during one of my randonnees, I needed a tire, and put that one on ... and discovered that it was a very nice tire. So, when they go on sale again, I will purchase them.

As for shelf-life, I go through half a dozen tires a year ... it is highly unlikely any of the tires I buy are going to be sitting there for more than a couple years.


So ... I'm curious ... is there some long-term event, in a remote foreign country, you are planning where you won't be able to buy tires?
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Old 01-16-06, 11:52 PM
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Originally Posted by Machka
You've posted several posts about tires lately. I don't think I've ever given tires so much thought.

MEC sells Conti 1000s for $13 each, they are the cheapest tires I can get ahold of, and so that's what I buy. I also need folding tires for my events, and it happened that MEC had Hutchison folders on sale, which I bought. Later, in the middle of the night during one of my randonnees, I needed a tire, and put that one on ... and discovered that it was a very nice tire. So, when they go on sale again, I will purchase them.

As for shelf-life, I go through half a dozen tires a year ... it is highly unlikely any of the tires I buy are going to be sitting there for more than a couple years.


So ... I'm curious ... is there some long-term event, in a remote foreign country, you are planning where you won't be able to buy tires?
Just biding some winter time learning. Getting ready for spring
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Old 01-17-06, 01:00 AM
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currently running 2 Michelin Pros (of 5 purchased in '97). Both on the front wheels of my 2 most used bikes over the past 1 1/2 years - the one on the softride is at 4K and still rollin. The one on the Colnago is at 3.5 K and rollin. Have 1 left and waiting...
On the Colnago, at the rear, I replaced a Specialized Comp purchased in '90 (one of 3 puchased on sale) , this past thanksgiving - it had well over 3.3K miles. Not bad for a very light racing level clincher.

Just purchased some Contis and Vredesteins from a LBS that had them hanging around for about 3 years, these will be my tires for this year. I also bought a BUNCH of Vredestein Fortezzas and Volantes (on sale) that will be put into the tire closet for the next 3 years before being used.
My preference is tires stored for at least 3-4 years before use; not just for increased mileage but mostly for the clearly 'finer' ride characteristics that they exhibit. This seems to hold true even for the lesser 'training' grade of tire. The storage key is to find a place with even temps, not high or low; neither high or low humidity - a closet seems to work just fine. Most retail stores are quite good 'storage' places as well, since they usually are very even in temp and humidity. I 'scavenge' for old stock a LBS is looking to move and often marks down.
If you;re doing a lot of miles, it really pays both in mileage and performance to have a couple of years supply 'aging' in a closet. At least if you think you're gonna be ridin 3 years down the line.
same, same for sewups - I have some Vittorias and Clements that are now about 5 - 6 yrs old and ready to ride.
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