The flexible Racktime solution for sporty bikes: The seat post can be quickly and easily mounted to standard seat posts, opening up the whole world of Snapit compatibility. Not approved for carbon seat posts. Weight: 669 g. Details: Pipe diameter: 10 mm. Type: Seat post. Type of mounting: Seat post mounting. Payload: 10 kg. Mounting: by quick release, suitable for seat post diameter: 26.6 - 32.0 mm. Suitable wheel size: 29 inch. Material type: Aluminium.