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I drilled a hole on my seat tube to install an internal dropper seat post (SATORI SORATA PRO) - YouTube
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Amazon.com: GANOPPER Dropper Post 27.2 27.2mm MTB Dropper Seatpost 28.6 30.4 Rudecer Shim 80mm Travel with Bike Seat Post Remote Control Internal Cable Routing Cable Kit : Everything Else
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