1) Replaced the crankset and bottom bracket. Had a good workout to pull the left crank arm off the old square taper set, the thing was like welded to the spindle. Thankfully I won't have to deal with such nuisances in rhe future - the new crankset is XT Hollowtech II.
2) Replaced the chain and cassette.
3) Cleaned, lubed and readjusted both derailleurs.
4) Replaced rear tube, as it had developed a slow leak. Turns out it had started cracking, apparently low quality rubber.
5) Washed everything squeaky clean, lubed the bits that needed it.
