Hi, 
    I need some new tyres and am considering some Falken FK 452s.  
My Bridgestones are nearly goosed and are 225/45 18 front and 245/45 18 rears. 
Theres a good deal on same sizes but 40 series instead of 45.  
Has anyone tried this? The car will obviously sit a wee bit lower but will it improve the handling or upset the ride? 
Cheers, Barthez.