Photo 1 of 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.

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Photo 1 of 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.