sixbolt

Sixbolt is a term used to describe a mounting arrangement characterized by six evenly spaced bolts around a circular pattern. It is used in several industries, most notably in mechanical assemblies such as braking rotors and wheel hubs, where six bolts secure a plate to a mating surface.

In bicycles and motorcycles, six-bolt rotors are attached to hubs with six threaded fasteners, allowing standard interchangeability of rotors and adapters. The six-bolt interface provides symmetric clamping and relatively easy service, though it requires precise alignment and proper torquing to avoid rotor runout or hub damage. An alternative widely used in performance settings is the centerlock system, which uses a splined interface plus a center lockring rather than six separate bolts.

Outside of transport hardware, sixbolt can appear as a brand name or product line in catalogs, referring to components designed around a six-bolt interface, such as mounting plates, adapters, or specialty fasteners. Because the term is descriptive rather than a universal standard, exact bolt circle diameter and bolt size vary by application and manufacturer.

In practice, users should verify compatibility of bolt circle diameter, thread pitch, and bolt length when selecting six-bolt components, and follow manufacturer torque specifications.