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Worn bearing seat

andi1363andi1363 Posts: 350
edited August 2013 in Workshop
My 3 year old Cube Agree Alloy frame has developed a rather nasty noise when making out the saddle hard efforts. After doing all the usual fixes to no avail, I have concluded that the lower headstock bearing seat in the headtube is worn and allowing the lower race to move under load. This is evidenced by the wear marks inside the frame.

I wanted to sound out opinions on repair/management. My first thought is to try metal filler as its cheap and reversable. Second idea is to get the 45 degree chamfer skimmed in a machine shop. Anyone got a better idea?

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