Hi guys

Moving from a 1.4 zetec to the St i've really noticed the harshness of the ride. Is there anything i can do to make it a bit more bearable? I'm looking at getting rid of the completely naff tyres that came on it (they're 'goodride' - yep not heard of them either) and getting some avons or hankooks. Would increasing the profile from 40 to 45 cause any problems apart from maybe putting the speedo out very slightly? (so they'd be 205/45/17)

Anything else anyone can suggest?

Thanks guys