This might help...my B29 arrived with beaded edge rims and beaded edge tyres for this size are impossible to obtain. Some people fit skinny tyres and the bikes look awful, totally out of proportion, plus driving on beaded edge tyres is maybe not the best thing to do as my B29 really motors on (alas stopping is another issue). Although some purists deny it, the BSA Bantam for a very short period had a 40 spoke rim and new rims are available I believe ex- UK (I got mine from Eades in Sydney).
Fitting these means that a decent range of tyres are available and the bike looks perfectly proportioned.
Of interest and why tyres for the TS and similar sized rims are so easily available, is that Rickshaw's in Asia still run this size as a standard...