I purchased a Jet 9 RDO at the end of 2012 and put it together. Rode it approximately 6 weeks and noticed a crack on the very bottom of the down tube just above where the rear shock bolts into the bottom bracket shell and just to the side of where the front derraileur attaches. Niner and Competitive Cyclist was great and replaced the frame immediately. I rebuild the bike and have been riding it for about 2 months and noticed the identical crack starting. It almost looks like a clear coat crack but it extends all the way across the down tube and starts up the other side.
Any one else had this issue?
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Thread: Niner Jet 9 RDO frame Crack