107mm is the standard for the xt m737 and also raceface turbine crankset.107 mm is at the low end but certainly not unheard of. See Sheldon's BB database: https://www.sheldonbrown.com/bbsize.html. As above, I wouldn't worry about the small dent but I would use little touch up paint on it to inhibit rusting.
Nice frame.
...and for xtr 900.107mm is the standard for the xt m737 and also raceface turbine crankset.
Hi Volker (we do know each othersMaybe my yellow BioRacer is a lot older than assumed - threaded fork and, by the way, italian BB!