With over two years of development and extensive worldwide testing, the TELLIS Dropper Post offers a complete solution that MTB enthusiasts have been waiting for and rightly deserve. The TELLIS post doesn't reinvent the wheel, but it does address some of the shortcomings of other problematic models currently available. The TELLIS is one of the most durable and simple height-adjustable seatposts on the market, with an easy-to-use, sealed hydraulic system that offers smooth lever operation, all at an affordable price.