most tread designs are either asymmetric or rotational. Assymmetric
designs have a tread pattern where one half the (inner side) has a
different tread design compared to the outer side. As shown in the
picture to the left, the asymmetric tread design look like two different
tyres joined in the middle. Asymmetric designs have become very common
on wider sizes and many low profile sizes.
There are many advantages to the asymmetric pattern.
The performance is better especially grip on wet roads, because it has
more grooves on the inner side it can disperse water better whilst at
the same time the outer side has a greater contact on the road. An
asymmetric pattern also performs very well in high speed cornering all
because of a much plainer surface on the outer side.
Asymmetric tyres are non directional they can be placed
on either side of the vehicle, left or right side. One thing to note is
that it does have an inside and outside mounting point hence they have
to mount the correct way by the fitter. The outside as shown on the tyre
sidewall must always be facing outwards. Any tyre that has not been
mounted correctly or changed is an MOT failure and is dangerous, it can
seriously impair the performance of the car. You can rotate an
Assymetric tyre without demounting it meaning you can take a tyre from
the left and put it on the right side of the vehicle and vice verse.
What you can’t do is change the inside to face the outside as mentioned
Some tyres can also be both asymmetric and directional
so you would have to make sure the tyre is fitted the correct way
failure to do so again would seriously impair the performance of the