Twin-Link (Virtual Pivot Point)

Overview

Twin-Link (Virtual Pivot Point) Linkage:

These use a rigid rear triangle, articulating on a pair of short links which connect it to the mainframe. It actually works in a similar way to a Horst-link design — imagine moving the Horst-link’s chainstay pivot much closer to the mainframe and you have the basis of a twin-link system. The only real difference is the length of the lower link. The Fuji Rakan illustrates this lack of distinction, like a missing link between the two styles.

As with the Horst-link design, here the axle’s direction is tangential to a moving instant-centre, while the related concept of the centre of curvature, or 'virtual pivot point', defines the way in which the axle path curves through its travel.

Some, such as Santa Cruz’s VPP system, use links that counter-rotate (turn in opposite directions), while many others, such as Giant's Maestro system, have links that co-rotate (turn in the same direction).

External links

• The ultimate guide to mountain bike rear suspension systems