Location: West Coast US

This bike has been serving me well for about 4 years now: Breezer Bikes - Bike Archive | 2011 | Ziggy

But now the rear tire has a bulging sidewall, so it's time for new tires. I have always wanted slightly thinner slicks than the tires it came with. The tires I have now have a bunch of MTB-like tread on the outside, but are slick in the middle. I really only ride on good pavement (commute) so thinner slicks would be fine.

I stopped by the LBS, but they did not have many 20" tires in stock.

The spec page says "Dahon Roulez 20x1.5"" but actually mine came with unnamed 40-406 2.0 x 1.5" tires that look different from the ones in the picture.

I'm thinking of buying the Big Apple 20x2.0" but how can I make sure they will fit my rim/fender combo? Also, I like the idea of reflective sidewalls, but the Big Apples don't seem to have those. Or do they? I'm looking at the "11100304 50-406 20 x 2.00 RaceGuard Black-Reflex" on this page: Big Apple HS 430 | Schwalbe North America

In a search, I see some other tires recommended in this forum but don't see an easy way to order them in the US.

Alternatively, if I want road slicks, I can go with something like Durano HS 464 | Schwalbe North America 20 x 1.1" but people prefer not to have 100PSI tires on small wheels?

edit: I see the ETRTO sizing now, so I need 40-xxx tires?