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Prepping the threadless | by the-macnab
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Prepping the threadless

This is Velo Orange's Grand Cru threadless bottom bracket, fresh out of the box. Notice that rather than threaded cups that slide together, this has threadless cups that thread together. As you thread the two pieces tighter together, the aluminum expansion sleeves slide up the slightly tapered cups, locking the bracket into place. Most people recommend greasing the threads, the cups underneath the expansion sleeves and the expansion sleeves, so we'll do all that before insertion.

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Taken on February 17, 2010