Factorysays it all. The best-of-the-best technology we have to offer is available in our Factory Series models with our buttery smooth, ultra durable Genuine Kashima Coat. These products are World Cup proven.The proven Transfer seatpost gets lighter and tighter for 2021. Completely redesigned from the ground up, with improved serviceability, decreased weight, reduced length, and decreased insertion depth.Patent-pending clamp design dramatically reduces stack heightProven Transfer internals with even easier serviceability than 2020 model25g lighter than 2020 TransferNEW lightweight under-bar 1x lever designor existing 2x lever (Supplied Separately - Not Included with Post)NEW 200mm drop optionUpdated design