Adjustable bicycle suspension

A bicycle assembly comprising:

• a main frame comprising a seat tube, a head tube and an intermediate tube connecting the seat tube and the head tube;
• a sub-frame configured to rotate with respect to the main frame, wherein the sub-frame defines a location for mounting a rear wheel;
• a suspension assembly for controlling rotation of the sub-frame with respect to the main frame, the suspension assembly comprising:
• a shock absorber, the shock absorber having first and second opposing ends and first and second eyelets at each end, the first eyelet at the first end connected to the main frame and defining a first suspension assembly pivot axis;
• an extension body, the extension body having a first end connected to the shock absorber at the second eyelet and a second end comprising a pair of extension arms connected to the sub-frame and defining a second suspension assembly pivot axis;
• an eccentric insert coupled between the shock absorber and the extension body, the eccentric insert having a cylindrical body at least partially disposed within the second eyelet of the shock absorber, and a pin aperture disposed through the cylindrical body, wherein an axis of the pin aperture is offset from an axis of the cylindrical body;
• and
• a pin coupling the extension body and the shock absorber, the pin extending through an aperture of the extension body, the pin aperture of the eccentric insert, and the second eyelet of the shock absorber;
• wherein the extension body comprises a channel shaped to receive at least a portion of the eccentric insert;
• wherein the suspension assembly comprises a first assembled configuration corresponding to a first overall length of the shock absorber and extension body in which the axis of the cylindrical body is offset in a first direction relative to the extension body;
• wherein the suspension assembly comprises a second assembled configuration corresponding to a second overall length of the shock absorber and extension body in which the axis of the cylindrical body is offset in a second direction, opposite the first direction, relative to the extension body;
• wherein the eccentric insert comprises an upper shock coupler and a lower shock coupler, and the pin aperture extends through both the upper and lower shock couplers;
• and
• wherein the upper and lower shock couplers are shaped such that they can only be assembled together in one arrangement relative to one another when the upper and lower shock couplers are assembled to the shock absorber and in contact with the second eyelet of the shock absorber.