This immediately brings back some nostalgia: Anyone who is familiar with mountain bikes from the early days of the sport - in the days when hardtails were the measure of all things and suspension forks from Rocks Shox and Manitou were absolute eye-catchers - is probably also familiar with the suspension stem. The suspension stems from Girvin or Softride took some of the weight off the unsprung bikes, even if the feeling on the handlebars took some getting used to. 

In the course of the gravel bike boom, the suspension stem is now making a comeback: Accessories specialist Vecnum is letting the freeqence stem loose on gravel bikes, as well as racing and touring bikes and unsprung e-bikes. Using a parellogram design, the suspension stem is designed to efficiently filter out vibrations and shocks and relieve the strain on the wrists to prevent tingling and numb hands.

vecnum.com