Unable to answer "This shop has been vacant. What’s here now?" – https://osm.org/node/1259381373 via StreetComplete 58.2:

Bike shop.
Mo. - Fri.: 11:00 - 19:00
Sa.: 12:00 - 18:00
So.: Nach vereinbarung.

Attached photo(s):
https://westnordost.de/p/226255.jpg