The TranzX YSP19 Dropper Seatpost features 125mm of smooth travel and a 31.6mm diameter, ideal for improving your ride. It includes external routing for easy cable management and a hard anodized black shaft finish for durability. The Up/Down Dropper Lever provides convenient seatpost height adjustments while riding. Constructed from alloy #6061-T6, this dropper seatpost is a dependable upgrade for any cyclist.