Is it ok to have different tyres at the front and back of the car?

Question from visitor, 24/09/2012 :I have a car with 185/60/15 tyres on it. Is it ok to change the front 2 tyres to 185/55/15 whilst leaving the back 2 as 185/60/15 's?
Answer by rezulteo, 24/09/2012 :

Hello,

We do not have sufficient information on your vehicle to advise you whether this tyre-fitting is suitable for your car or not.

Nevertheless, we do not advise mixing tyre types on the front and back of the vehicle for reasons of security and technical coherence.

Best Wishes,

The rezulteo team