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Amazon.com: VINCITA Rack Mount Seatpost Clamp - for Bike Without Rear Rack Threaded Hole Fixation - Suitable with Seatpost Diameter 31.8 mm (Seatpost Tube 34.9 mm) - Lightweight -Mountain, Road, Folding Bicycle. : Sports & Outdoors
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Amazon.com : OMNI Racer Worlds LIGHTEST Race-Lite Carbon Titanium Seatpost Clamp 34.9-35mm Glossy : Sports & Outdoors
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