Originally Posted by
Ozonation
I don't have any experience with 20" wheels, but I can see how in some cases having 20" wheels could give me a better ride or at least more options. If you're mostly confined to the city, I suspect 16" wheels would serve you 90% of the time.
I would go further and say 100% of the time. I can't think of any specific set of conditions where riding a 16" wheel would require you to walk where a 20" wheel would allow you to ride. Or maybe I can - some loose gravel/sand, with a fat 20" tyre, you could conceivably ride through on the 20" wheel but not the 16" one. So except for a very contrived situation, you're OK 100%.