October 28th 2005
All
of us in the automobile repair business are facing the same question
we hear every year:
” Will my all season tires be safe enough
for this winter?”
Firstly, of-course, we have no idea what
kind of winter we are going to get, but snow
and ice are definitely on the menu.
About the only people who will be able
to manage with so-called “all season” tires
this year are those who just bought a
new car with brand new tires and who
don't HAVE to go out until the storm has passed,
never go skiing and don't have
a winterized country cottage that they
visit every weekend.
So-called "all-season" tires are really
a compromise; they’re passable if you're
willing to stay home when the roads are
covered in snow and ice. But a lot of
people need to use something superior.
That’s because tires have changed significantly
in recent years. They're much more custom-built,
even on family sedans.
From cars to minivans to SUVs, many of
today's vehicles come with wide, low-profile tires
that only a few years ago would
have been be found only on the high performance
cars.
Unfortunately, both performance and all-season
tires tend to lose their grip at approximately
minus 15C.
In cold climates and on icy roads, they
just don't work like the new generation of
soft-compound winter tires.
There have been major advancements in
both construction techniques and rubber compounds.
Remember when snow tires used to be noisy
and hard-riding and were a disaster on dry
pavement?
Today, all major tire companies market
special compound winter tires with refined
tread patterns that grip just as well
as studs, while offering a smooth ride
and competent road-holding on bare roads.
They have names like Bridgestone Blizzak,
Goodyear Alpin, Michelin X-Ice and Yokohama Guardex.
The practice used to be to install winter
tires only on the end of the car where the drive
wheels were located, but front wheel
drive almost dictates that motorists should
fit four snow tires if they want to drive as safely
as possible.
This gives the vehicle a similar grip
at all four corners.
With front-heavy, front-wheel drive,
you've got all this extra braking ability
and traction in the front so that adding just two
winter tires on the front means that the
back end has a very strong tendency to lose traction
and have you facing the way
you came very quickly indeed.
On the Transport Canada Web site, the
federal government agency stresses that winter
tires should be installed in sets of
four to help maintain control and stability
in slippery conditions.
But what tires to look for?
Both Transport Canada and the Rubber
Association of Canada recommend motorists
choose tires marked on the sidewall
with the pictograph of a peaked mountain
with a snowflake inside it.
Doing so ensures the tires have the traction
necessary for use on ice and snow at low temperatures.
The Transport Canada Web site lists brands
of tires that meet that severe-duty specification.
Most of us can't sit home until the ploughs
go by. If that's the case, an investment
in winter tires could head off
a serious, life threatening collision
or major vehicle damage, or both.
Again in our shop we often hear such arguments
as: I've got antilock brakes (ABS) or I've
got a sport-utility or I've got
four-wheel-drive. Therefore, I don't
need winter tires.
These features are fine, but any vehicle
will grip better with tires specifically designed
for cold and ice.
And most SUVs and pickups come with tires
that my do well in sand and situations where you
want "flotation,"
but that may be the opposite of what you
want during an icy Canadian winter.
Studded tires do offer excellent traction
on ice if they are in good shape, but they are
noisy and wear the pavement.
Most provinces do not allow studs at all,
or only allow them during the winter season.
Winter ice tires work just as well as the
best studded tires, so I would avoid the hassle
of studs.
The most elegant answer, if you can afford
the initial investment, is four steel wheels,
to replace your glamorous and
fragile alloy wheels.
Firstly, the cost of winter and spring
changeover becomes minimal, secondly the two
sets if tires will last twice as long and
last but not least, a tire that has had
its bead stretched on a tire mounting machine
multiple times will eventually begin to
lose air pressure and will have to be reinflated
from time to time.
Some motorists buy used rims from auto
recycling yards.
Others look to the want ads at this time
of year, since people sell their vehicles or
return them on lease and then sell their
used winter tires.
Sometimes, you can save money and improve
grip by going "minus one." Say your car comes
with high-performance tires
and wheels in the 16-inch size. A tire
or auto dealer can cross-check wheel fitment
and you may find that the base model of
your car comes with steel wheels in the
15-inch size that are less expensive to buy
(same for the tires).
How can a narrower tire improve road
grip? The rule of thumb from experts is that
a narrower tire will cut through rain, snow
and slush and bear down on the road better
than a wider tire, which will tend to float
up and over, losing grip in the process.
And there may be one more technical breakthrough
about to arrive in tire technology which will
make articles such as this
entirely irrelevant.
This year, the Goodyear Tire company
is offering a new kind of tire that uses three
different types of compound molded into three
different tire patterns, all on the same
carcass. The Company says that these “Tripletred”
tires will last up to 130,000 Kilometers
and will give ice performance similar
to that of a pure winter tire.
If this technology proves to be as good
as it sounds, then we may be back to an all season
tire that actually deserves its name.
Note: Latest test by Consumer reports
rates the Triple Tread as the outstanding choice
in an "all season" tire,
but doesn't think it's much good for real
winter conditions.