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 new "old" tyres

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derekg
Scooter Rider
Scooter Rider


Number of posts : 79
Age : 70
Location : Stirling Scotland
Points : 2732
Registration date : 2010-09-02

PostSubject: new "old" tyres   Sat 14 Jun 2014, 03:11

Anyone  have a comment or experience on this.
Ordered a new IRC front tyre on line for my 2009 scooter. Existing done 15000 from new and still just OK. On the side wall of the new one supplied it advises that it was manufactured in 2007...says 21 07 ( so week 21 year 2007)...so a 7 year old "new" tyre....older than my bike and the tyre I am replacing!
ROSPA ( safety organisation in UK) advise on web never to use a 6 year + old "unused" tyre as its dangerous...OK to use a tyre up to 10 years which is in use ..but never over 6 years if never used...to do with rubber deteriorating more quickly if unused. Supplier is taking it back so I dont have a problem BUT why are they allowed to sell a 7 year old tyre as being "new" when this is the professional advice from ROSPA. You can take a chance with some things but never with tyres.
And I do wonder just how aware people are of this issue/danger.
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hotwings
Silver Wing Expert
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Number of posts : 880
Age : 47
Location : Ontario
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PostSubject: Re: new "old" tyres   Sat 14 Jun 2014, 06:53

How can rubber deteriorate more quickly on an unused tire? A used tire is obviously in sunlight and on extremely hot surfaces. An unused tire is usually stored out of direct sunlight/heat in a controlled environment. Maybe being pressurized helps! Do enlighten me.
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john grinsel
Silver Wing Guru
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Number of posts : 2252
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PostSubject: Re: new "old" tyres   Sat 14 Jun 2014, 07:23

5 years is what I have heard in US-----buying new/paying for new/I want new----it also depends on how tire has been stored/stacked.

I always check dates on new tires I buy.
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derekg
Scooter Rider
Scooter Rider


Number of posts : 79
Age : 70
Location : Stirling Scotland
Points : 2732
Registration date : 2010-09-02

PostSubject: Re: new "old" tyres   Sat 14 Jun 2014, 07:30

Hi
If I were a scientist I might be able to understand and explain....but I am not.
I googled the issue....try that and see whats comes up...becaiuse more than ROSPA make comment on the subject.
What seems to be being advised by ROSPA is vulcanisation of rubber is speedier where rubber is left in storage rather than being used. They specifically advise that a tyre in use can be OK up till 10 years but a non used tyre out of storage should not be used after 6 years. As far as I am concerned I am not willing to chance it. If I buy a new tyre I expect it to be a new unused tyre and not an aged unused tyre...same with anything really except that tyres are more important for safety.The supplier interestingly agreed to reimburse the cost and my postage without any debate after I pointed out ROSPAs advice.
I do remember seeing a TV programme in UK where they tested a 10 year old "new" tyre against a split "new" tyre and the old one just disintegrated after a while...lumps of rubber spun off...alarming!..so the science appears correct. 6 Years may be ROSPA being "over safe" but I would rather that.
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bikerboy
Touring Scooter Rider
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Number of posts : 359
Age : 74
Location : Leyland England
Points : 2760
Registration date : 2011-05-12

PostSubject: New Old Tyre   Sat 14 Jun 2014, 09:08

Is the IRC a common tyre in the UK?  I suspect not as we seem to get Bridgestone HOOPs on ours.  This could explain why the tyre has been in stock for some time but still better not to use it.i
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derekg
Scooter Rider
Scooter Rider


Number of posts : 79
Age : 70
Location : Stirling Scotland
Points : 2732
Registration date : 2010-09-02

PostSubject: Re: new "old" tyres   Sat 14 Jun 2014, 14:36

Bikerboy...I am a bit of a gatecrasher on this site...as I have admitted before!!..as I have a Honda SWing 125cc...( erroneously called a Silverwing by many sources including the Twist and Go mag. which had me fooled when I first bought it...hence me joining this site.).....That bike came new from dealer in Glasgow with IRC tyres...so maybe they are more common on that bike?
However I have learned a lot from this site as many things are "similar" on my bike... I now do all my own servicing and maintenance having gained confidence from reading things here.Its a great site.
I just wondered how many riders were aware of the ageing tyre issue ...as many car owners I speak to have no clue about the matter. Older caravan tyres and trailers is where the main danger lies.
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cotetoi
Silver Wing Rider
Silver Wing Rider


Number of posts : 482
Location : New Brunswick, Canada
Points : 2194
Registration date : 2013-06-27

PostSubject: Re: new "old" tyres   Wed 25 Jun 2014, 19:05

My bike is a 2005 with original tyres OEM IRC with 4000 km on them. I put 8000 km of my own. The rear had worn to the wear bars and I have replaced them with Metzler Feelfree. The manufacture date on the originals was 2004, making them 10 years old. I feel better now.
My province will introduce new regulations re. motorcycle tyres next year: don't know what they'll be, but I suspect it might have to do with age and matching brands on both wheels.
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