Originally Posted by WhyFi

Tires are consumables - no reason not to try it yourself when your current tires need replacing. For myself, moving to 28s (from slightly oversized 30s, by current standards) was a slight, but noticeable, difference in handling and comfort. I preferred the feel of a bit of increased agility, though some might think it increased "twitchiness" and not like it. The small decrease in comfort wasn't an issue for me.