I recently switched from Michelin to Bridgestone tyres, I've been using the michelin for a long time and fancied a change as the Michelin S1 is a very old tyre design (been around since the early 90's if not before) they are both a 'sports' type tread with a nice rounded profile (not like the old traditional 'wheelbarrow' type scooter tyre) but after switching I noticed something about the profiles of the tyres, the michelin has a profile (radius?) that looks like it's been cut out of a circle (single radius profile??) and the tread depth is the same at the edge as it is in the middle... but my new bridgestones have a profile as if it's been cut out of a slightly more oval type shape (more 'pointy' on the middle) and the tread depth gets shallower towards the edge of the tyre.
I was wondering what the advantages are of both designs and why a tyre manufacturer would do one or the other, for what it's worth I prefer the brighestone's they feel less 'squirly' when traveling over white lines and patches in the road but that might be nothing to do with the shape of the profile??
for reference here's what the look like
Bridgestone
http://ssl.delti.com/tyre-pictures/Brid ... oopB01.jpg
Michelin
http://pictures.universal-tyres.co.uk/t ... s1-600.jpg
and here's a bad 'paint' picture showing what I'm trying to describe..
