Originally Posted by
thehammerdog
How do I know what type I have ? Is the any standard size to a modern BB. I do have external BB I think. But I do not know what size it is? There BB looks to be average size but I do not know if it is oversized, appears threaded I guess. Are they serviceable or just replace the entire BB unit. I am old schooler so the older types I am good with.
I need to replace chainrings and figured BB would need new bearings or to be replaced as well.
Thanks.
Maybe this will help: Whether or not the bearings need to be replaced does not depend on the desire to change chainrings.
If you want to know what BB you have, look closely at it, write down any and all character strings printed or stamped on it, put those character strings into something called an "internet search engine", compare the results with what you have paying particular attention to the pictures, then go shopping. You could also post in the Personal Research and Shopping Service forum. HTH.