Quick query after a bad day in which front tyre ripped and left me a 4 mile walk home in a rainstorm.. Will I notice much difference fitting 1.75 M+ tyres rather than 1.5? My hybrid commuter has been running on 1.5 tyres (City Jets) but there's so much glass about I'm thinking of going back to M+ and just wondered whether to stick with the same size. Have had M+ before but not of these sizes. Also (forgive me not Googling for an hour but I've really had it today - just need a bath and bed) does anyone know where they (the Kevlar ones) are currently cheap? Thanks.