You are reading a single comment by @deleted and its replies.
Click here to read the full conversation.
-
I'd say a combination of cack handedness and incorrect selection of materials. Boardman are a great example (I like boardmans btw). Take an ally frame, steel bearings and 'varied levels of experience' halfords 'technicians' and you have a recipe for disaster. Plus I don't think enough thought was put into the design around the BB area when people swap from threaded to press fit.
deleted
Howard
Every other industry in the world presses cartridge bearings into housings bored in the machinery framework. I'm not sure why bicycle makers have managed to turn such a well understood and widely used practice into such a clusterfuck.