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Join Date: Jan 2010
Location: Haarlem, Netherlands
Posts: 1,313
Bikes: Pinarello Dogma F8, Pinarello Bolide, Argon 18 E-118, Bianchi Oltre, Cervelo S1, Wilier Pista
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Every 2-3 years for me, but I don't always sell the old ones. I still have the last 3 bikes, from 2010, 2012, and 2015. I sold my 2008 bike in 2011. It has been more of what I would call a "technology refresh" each time more than an "upgrade," with the latest being the switch to Di2.