The lowest price component in this Track Drive 1 parts-list fiche is the Bolt(2vy).
A sample from the products for the Track Drive 1 include: Bolt(2vy), Housing, Front Axle, Axle, Front, Nut, Hexagon (8f3).
The sub assemblies and components that make up this Track Drive 1 include this Axle, Front, the most expensive part.