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Steerer thread damage likely due to cycle being ridden with a loose headset adjustment.
Have had success with framebuildier "floating" some brass onto the damaged area and rethreading.
Brass plenty strong eno' to hold the threads so long as there be no misuse.
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This manner of damage oftimes due to cycle being ridden off curbs/down steps/jumps.
Suggest examine blades for any evidence of "relaxation" due to repeated vertical impacts.
Do the suggested repair and ride normally; then all should be well.
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Last edited by juvela; 02-13-19 at 07:04 PM.
Reason: addition