>>1799086That's not a spot on the frame particularly susceptible to cracking. The only time it's under any stress at all is when you're actually doing a shift, and even then barely any. Check literally any other weld on the frame for cracks before that one.
>>1799182Where it sounds like it's coming from isn't always where it's actually coming from. Clean and lube seatpost and saddle rails, lube and tighten seatpost and saddle clamp bolts, make sure QRs are tight, if spokes are loose they could make noise, if it's synced with your pedaling check that your shoelaces aren't hitting the frame... etc.
>>1799225no big deal, theoretically you should pump up the smaller one to a slightly higher pressure but the difference would be tiny and not even worth thinking about
>>1799244Needing to use the drops to get better leverage on the brake levers is cope for having crappy brakes and/or zero hand strength. Two fingers on the lever from the hoods should be plenty to skid if you wanted to. Consider getting better pads.
