You never know what is lying on the surface of a regular road.
If something strikes the shock absorber and damages the shell case, the mono-tube, which is constructed of only one inner cylinder, will not be able to perform its stroke action.
If you think about it, can you really say the mono-tube design is optimal for the street?
I'm afraid the answer is "NO".
Let's take a look back at the merits of the twin-tube.
*It is easier to secure sufficient stroke, because the oil and gas chambers are separated and not positioned serially.
*The base valve enables to keep gas pressure low, allowing for a more comfortable ride.
*Low gas pressure avoids stress on seals and keeps friction levels low.
*Compared to the inverted type, friction can be suppressed.
*Even if the shell case is slightly damaged, the function of the shock absorber remains unaffected.
The twin-tube design can answer all the street shock absorber problems. Furthermore, if you compare it with the mono-tube, it has lower costs due to superior manufacturing processes.
Other extremely important factors are high quality and reasonable price.
In other words, the optimal design for the street is the twin-tube.