I don't know the answer but I also don't know why anyone would think of reducing the rear contact patch!
hmmm, you are assuming the contact patch is reduced of course, there ins't a great deal of difference between the contact patch of a 150 compared to a 160 and different manufacturers may have a different profile and actually have more contact patch. Narrower tyres benefits are faster turn in and better wet weather grip,
Lovely contradiction there!
lots of kafas out there. Do what you want. Too many darrsi types out there trying to put imagination off and stuff.
Only just seen this reply, not quite sure what you mean by that comment, just you being a miserable git as usual i s'pose?