No, it also fits on 17cm

Regrettably no, according to the manufacturer: Suitable for all door frames with a depth of 11 - 16 cm.

This should be a little time-consuming. Ideal for a plumber or pipe fitter.

My door frame is 80cm; this is probably the minimum width for this bar. The overlays have a maximum width of 90cm, so I don't see any problems with the 82cm frame in terms of stability or safety.