28 spokes may be OK in a 16" wheel , on a larger wheel, especially for touring I prefer many more spokes..

I found 48 in a 700c wheel great, but if crash damaged, replacement will be costly in time and expense..
now living and helping out at a shop that sees a lot of cycle tourists

cassette 36 spoke wheels will be adequate and should it be damaged,
off the shelf replacements in small town shops are more likely.

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