This is the only bicycle seat that transforms into a bike lock. The Removable Seat Bike Lock is ideal for urban cyclists seeking comfort and bike security, the foam padded 8 1/4″ W x 10 1/4″ L saddle fits any bike model with a built-in universal adapter.

When removed from the seat post with a simple lever, six steel links nestled underneath the seat unfold to form a 39 1/2″-long “chain” that wraps around the bike like a standard cable or chain bike lock. Secures with a key (three included). Brown. Folded 8 1/4″ W x 10 1/4″ L x 4 1/4″ H. (3 lbs.)