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How are the Pivots?
Fucking magical, but the big shocker was how I was faster on the full-rigid singlespeed Boo! Then again the Boo weighs as much as my road bike (19lbs, true story).
All three bikes were awesome (in order it was a Pivot Mach 429, a Pivot 5.7 Carbon, and the Boo 29er SS belt drive with a Niner carbon fork)