Patent 7938425 was granted and assigned to Specialized Bicycle Components on May, 2011 by the United States Patent and Trademark Office.
A bicycle frame can have a main frame, a sub-frame and a shock. The sub-frame can move in relation to the main frame and the shock can be used to regulate that relationship. A linkage can also be used to regulate the relationships and control the rotation. The shock can further have a pair of extension arms to span a seat tube which is part of the main frame.