Trouble is, there are so many versions of the XCT 29, depending on the year, that it's hard to diagnose over the internets without knowing that model's features/specs. At this point you're better off going to your LBS, describing the problem and have them look it over.
and it's a fork, dammit.
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Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."