Corolla T Sport Tyres

[MattSturt]

After 21K I needed to replace the 2 front tyres on my CTS. My jaw dropped when the guy at National Tyres quoted me a price of over 200 quid a trye, this was for a like for like swap of the factory fitted Michelin 195/55/16s. He told me this wasn't commonly stocked as not many other cars used that size as standard (typical). I then asked the guy about fitting a wider tyre and settled on the Avon 205/50/16's at 105 quid a go (nice looking tyre which fills the rim)

My question is this, National Tyres advised me to put the 2 new wider tryes on the back and put the still good 2 back Michelin's on the front. A week later I had my 20K service by my main Toyota dealer and to my surprise they put the 2 new Avon's back on the front. Why would this be, is it to do with the handling or maybe the weight distrubution ?

Matt