The week and year of manufacture of the tyre is always
marked on the sidewall. A tyre marked 2501 was manufactured
in week 25 of 2001. Manufacturers usually also mark
tyres to show which factory they were made in, so they
can trace where and when a faulty tyre was made.
Where do I find this on my tyre?
Find a string of numbers & letters close to the
tyres bead usually starting with DOT at the end you
will find the 3 or 4 numbers relating to your tyres
age. If your tyres have just 3 numbers they will have
been made pre- 2000 and even if they still have plenty
of tread on them we suggest changing as they may be
subject to rubber corrosion.
You too might want to check when a tyre was made. Tyre
makers specify strict storage conditions for tyres,
as they can deteriorate if these aren't met. Signs of
ageing can include cracking in the sidewall area due
to ozone attack, and discolouring if they come into
contact with certain chemicals.
Tyres have protective chemicals impregnated into the
rubber compound, released as the tyre flexes when you
drive, to resist ozone attack. You rarely see tyres
that have evidence of ozone attack unless they've been
mishandled before they've been sold.
We do not recommend fitting tyres that are more than
a few years old even if they have been on the shelf.