I am going to replace my OEM Bridgestone with an Avon front. Not quite sure which is the correct Avon tire everyone is using. Is the 55 a replacement for the 45, as I cant seem to find anyone who sells the 45 in the size I need. Can I just replace the front with an Avon, and still use the OEM bridgestone on the rear, or should I get a matched set...same mfg? Thanks.