---
title: Mono-tube Versus Twintube
description: What's the difference between monotube versus twintube shocks?
---
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# Mono-tube Versus Twintube
## What's the difference between monotube versus twintube shocks?
The difference between a twin tube and mono-tube is technically quite simple. A twin tube shock is a tube within a tube. The inner tube is the working tube. The outer tube is the reservoir. Twin tube dampers can be gas pressurized and non-gas pressurized. See the diagrams below for more detail.
A mono-tube damper is a single or “mono-tube” design. This is a simple and durable design, allowing for larger working piston and less moving parts. Mono-tube shocks are also “gas pressurized” to eliminate cavitation in the valving, thus providing a “no fade” safe, stable ride.
Each design has pro and cons.
More information can be found in on our web page by following the link [https://www.bilstein.com/us/en/technology-and-knowledge/basic-know-how/](https://www.bilstein.com/us/en/technology-and-knowledge/basic-know-how/)
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