You are reading a single comment by @Ndeipi and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Ndeipi
This is the alu eccentric BB insert, and the bolts which holds it. It is used to make the extra chain taught because it's doesn't have a derailleur/tensioner!
There's some masking tape with capital letters written on the insert, but I couldn't make the text out.
The old BB was seized in this alu insert. Even though I had only put it in there a week or two ago for chainline calcs! Too much porridge that morning clearly. When I tried to remove it today all I would achieve was to slightly rotate the whole alu insert even though the frame bolts were very tight. The problem was that I had cleaned and greased the insert, and that allowed it to spin in the frame before I could add enough force to free the BB.
The solution was to remove the whole alu insert again (with the BB stuck inside it), clean off the grease, apply carbon assembly paste instead, slide it back into the frame, tighten the frame BB shell bolts to secure it, remove BB with all my strength, bin it, loosen BB shell bolts, remove the alu insert again, clean off the carbon assembly paste, regrease, reassemble, insert new BB. Epic faff.
3 Attachments