I just got the bike from my friend few hours ago . After finding this out I never ride it , will riding it may cause damage inside?
Is it fixable?
by SmallOffice6616
I just got the bike from my friend few hours ago . After finding this out I never ride it , will riding it may cause damage inside?
Is it fixable?
by SmallOffice6616
4 Comments
That needs to get into a shop ASAP to have them remove it to check for damages then reinsert and correctly tighten.
There’s a special Shimano BB tool to screw that back in … that is the bearing shell. The way that design was the shells screw in on either side and they are separate. It’s been a long time since I’ve serviced that design but I do believe one is a right hand and the other is a left-hand thread so be very careful if you try it yourself.
It should not come loose. There’s a good chance the bb needs to be replaced since loosening is a sign the bearing is not working correctly.
On a Shimano square taper crank/bottom bracket, that appears to be the fixed side fitting. It belongs on the drive side. For English/BSA bottom brackets, the most common, the driveside is reversed threaded.
Note: the driveside has a flange that fits flush on the frame. The non-driveside does not have a flange and pre-loads the bearing. It should be snug so that spindle play is removed, but not so tight that it restricts bearing movement.
If you forced that fitting in, then there’s good likely hood that you’ve damaged the threads on your bottom bracket shell. Take your frame to a shop, or co-op. Hopefully your frame’s threads can be salvaged with a bottom bracket chasing tool.
Good luck.