Inside this noteStart with where you park and for how longU-lock, folding or chain: what each type does wellWhat security ratings actually meanWhat to pay for and what to skipCommon mistakes when locking up in a cityTravelTaped to the doorHow to Choose a Bike Lock for City Parking: U-Lock, Folding or ChainHow U-locks, folding locks and chains compare, what Sold Secure, ART and brand ratings test, and what lab and grinder tests show at each price point.Travel7 min read6 sources