"Existing bike locks are heavy (2–3 lbs) and have to be carried separately from the bike, so many cyclists skip locking up for short stops — leading to frequent theft. Existing folding locks solve the weight problem but still need a separate strap or bracket that adds installation friction."

"1) The user attaches a lightweight bracket to the bike frame. 2) The lock unfolds from the bracket into a rigid loop. 3) The loop passes through the wheel and around a fixed post. 4) A push-button cylinder secures the loop. 5) To store, the user pushes a release tab and the lock refolds back into the bracket."

"Unlike U-locks, this lock never leaves the bike, so there's nothing extra to carry. Unlike cable locks, the folding steel links resist bolt cutters. Unlike other folding locks, ours mounts inside the frame's existing water-bottle bosses, so no drilling or added hardware is needed."