not usually mate, tyres are designed to work as a pair you could mix tyres from the same brand ie diablo front and a corsa rear but its usually a big nono to fit say a pirelli front and a bridgestone rear, one companys idea of a 180/55 profile is different to anothers as is the tread pattern on my 916 i found a 180/55 was better than a 190/50 for fast road/track riding |