The shock-absorbing seatpost

photo credit: emdot

To improve your comfort on the bike when you ride on dirt roads or trails, it is recommended the assembling of a shock-absorbing seatpost.
Generally, you will run into two kinds of these, a simple and a complex one.
The simple has the drawback of changing the height of your saddle when you ride over bumps.
Furthemore, it will be possible the increasing of frictions and wear. Consider that your weight isn’t always focused on the seat, and its force applied to the post isn’t always in line with its movement.
The complex shock-absorbing seatpost has a parallelogram in the top that absorbs bumps by moving the saddle horizontally, and your seat height remain costant.