On Sun, 01 Apr 2018 07:43:42 +0700, John B wrote:

On a bike with 700C tires I am currently running 23mm tires. Some of
the roads in Bangkok are pretty rough and my front fork could take a
25mm tire, but probably not wider, and I'm wondering whether it is
worth the effort to change from 23 to 25mm tires.

Alternately I could go a bit wider on the rear but again I'm wondering
whether that is worth while as the majority of the bumps I feel
through the front wheel and handle bars and the occasional snake bite
flat I get is always on the front.

My experience is that 23 to 25 mm nets no difference in perceived ride
quality, but a good reduction in pinch flats.

I have one bike with 26 x 1.8s and those are noticeably different than
the 25 mm tires on my old race bike or the 28 mm tires on my randonneur
bike. I would have to be trying very hard to pinch flat the 1.8s. A
hard enough hit to pinch flat would probably throw me from the bike.
With the 23s I could pinch flat on an uneven expansion joint. The 25s
take a good sized pothole at a pretty fair clip.