ok I have bridgstone tires on my bike now. When I got the bike the front tire was flat (nail) so the guy replaced it , so I have 1 sumner on the front one and it looks llike new. The back :headscratch not so good, I see guys on here talk about Michelins and how good they are SO I want one . The ? is it a big deal if I have a bridgstone on the front and a michelin on the back?