Abstract: An insert for a bicycle has a central portion and a contiguous outer portion to form a unitary elongated body, the body being dimensionable by reference to major and minor datum lines, the outer portion forming a flange. The body includes a first outer surface defined by the central portion, and a second opposing outer surface defined by the central portion and the outer portion. The central portion includes a through-hole that extends perpendicularly through the body from the first outer surface to the second outer surface, wherein the hole defines a hole axis. The central portion has a non-circular outer profile that encloses the hole axis, and the flange has a non-circular outer profile that encloses the hole axis, the outer profile of the flange being larger than the outer profile of the central portion. The hole is disposed asymmetric with respect to the minor datum line.