Hi, I’m currently restoring a 90’ MTB, I removed the BB to clean the shell, regrease bearings etc and noticed there’s a hole where the BB and chainstay join.
I haven’t worked on many bikes before so I’m not sure it’s normal or if the frame is good for the junkyard
by mkp0x
3 Comments
That’s normal. Also, don’t forget to remove the rest of the BB.
Basically any welded or brazed frame will have holes where the tubes join, it’s party of the manufacturing process, they are releaf cents for gas build up during welding/brazing, nothing to worry about
Thank you for the quick answers, much appreciated