-24.92% OUT OF STOCK Seatposts Ritchey - Di2 Seatpost Battery Mount RITDI21712111 €7.50 €9.99 Ritchey - Di2 Seatpost Battery Mount. Securely hide your Di2 Battery within your seatpost.Material: rubberAvailable in two sizes:- for seatposts from 27.2 to 28.6mm- for seatposts from 30.9 to 31.6mmWeight: 8.9g (27.2-28.6mm), 14.2g (30.9-31.6mm) View