As the name suggests, the PRO Tharsis XC Carbon Seatpost is incredibly lightweight at around 230 grams, helping improve speed around cross-country courses and trails alike. Made from uni-directional T700 and T800 carbon fibre so that its low weight doesn’t sacrifice any strength, it's perfect for a super-fast XC bike. The single-bolt head design is in-line with the post, keeping the weight forward and over the bottom bracket whilst the shaft is compatible with Di2 batteries for the easiest shifting experience.