Originally Posted by
banerjek
Heck no. My commuter takes 25 and less. On my racer, I've found that there is inadequate clearance even for some 25s.
But I've put many thousands of miles on a touring bike with 32's. You can maintain a decent clip with 32s, but you still won't be as fast.
Are you comparing tires or bikes?
A bike with 40's on is going to handle very differently than one with 23's.
By 40s I really meant 700x32 with fenders.