Sorry for lack of details on the bike. It's late 80s (guessing) Norco Bigfoot MTB that I picked up for 20$ in very rough shape and built back up. So, steel frame (tange 1000, straight gauge crmo), I cannot see any cracks.
It's set up ghetto-single speed right now, with a 48T biopace ring in the middle position and the 17T cog on the cassette getting an almost-perfect chainline. The tension is sufficent, no chain slap.
No fenders or other accessories on the bike, in fact as of right now there isn't even a rear brake or seatpost/saddle