Tire dates - usable age?

They spend a massive amount of money telling us they spend a lot of money in R&D. Tires have not radically improved much in the last decade. MotoGP development is pretty pointless for street tires. Aside from lightweight expensive carbon fiber belts, radials haven't changed much.

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Use your own judgment.

If I see cracks, I change it. If there is an obvious flat spot, I'll change it as well.

Total Control had some pretty strict rules. Sport tires 2 years, and ST tires 3 years. I've generally used mine for longer but the rule seems to be the softer the tire compound, the faster you need to change them.
 
I've heard the '5 Year' limit as well.

Take into account like others have posted regarding storage etc...

It's the two main contacts between your bike and the road..... This IMO isn't an area to 'save money' on.

In the end it's your choice to make.
 
They spend a massive amount of money telling us they spend a lot of money in R&D. Tires have not radically improved much in the last decade. MotoGP development is pretty pointless for street tires. Aside from lightweight expensive carbon fiber belts, radials haven't changed much.

I took a training course in South Carolina at Michelin's Laurens Proving Grounds. I can assure you that a significant amount of resources is being spent. I've met engineers and test drivers from all over the world and also drove on 3 of Michelin's test tracks. I've been selling and mounting tires for 10 years and I will testify in court that what you got in 2003 is nowhere near as good as what you get in 2013. Rubber compounds and other materials as well as technology applied, have made drastic improvements. It is most visible in the higher echelon obviously but even economy tires are benefiting.
 
^ Of course you would not notice that on a cafe racer, which is a riced up cbr 125 :p


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Racing tire design has very little relevance to street tires.
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Today's sport touring tires have grip levels offered by hypersport tires of less than 10 yrs ago, and last twice as long as hypersport ones, or more.
Today's hypersport tires could be ridden to podiums in superbike races a decade ago.
 
Thanks! It shall stay on there then. I like it a lot.

This makes a point, though - if you are already using the tires, and they look fine and are not cracking, don't worry about the age too much. Conversely you could mount a dried out 10-year old tire that initially looked fine, if it was not used, but it will start looking like crap very fast.

Also also, the GT501 falls into a class of tires that have been in production for around a decade now, so it is actually possible for you to wind up with a set that has been lying around for years. It would be worth looking at the date code closely, for those in the market.
 
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