Ender 3 stock Bowden tube inner diameter? Worth upgrading?
I disassembled the hotend side of the Bowden setup to check for deterioration (and found an actual hole in the tube!) for the first time since getting a decent caliper, and after making a clean cut to remove the damaged part, measured the inner diameter at 2.19-2.21 mm. I'm not sure if that's enlarged from wear or the original size it was manufactured as, but either way this suggests that upgrade to Capricorn at 1.95 mm (±0.05 mm) inner diameter should make a significant difference vs my current Bowden tube.