Abstract: The invention provides a bicycle lock with three rigid lock rods, either separable or articulating, which together provide an adaptable secure frame-to-wheel-to-security-object bicycle locking mechanism in conjunction with a removable seat post. One rod is inserted partially into the removed seat post, and the other rods extend outward from the first rod and then back toward the seat post for locking to a seat post clamp thereon, thus forming a closed triangular lock. The lock can be passed through the bicycle frame and wheel and around a bike rack or other external structure before closing to secure both the frame, wheel and seat post to the structure to prevent theft of any one or more of these components.

Abstract: The invention provides a bicycle lock with three rigid lock rods, either separable or articulating, which together provide an adaptable secure frame-to-wheel-to-security-object bicycle locking mechanism in conjunction with a removable seat post. One rod is inserted partially into the removed seat post, and the other rods extend outward from the first rod and then back toward the seat post for locking to a seat post clamp thereon, thus forming a closed triangular lock. The lock can be passed through the bicycle frame and wheel and around a bike rack or other external structure before closing to secure both the frame, wheel and seat post to the structure to prevent theft of any one or more of these components.