TMD’s keyless bike lock is a $280 solution to a $60 problem

I’ve seen lots of so-called “smart” bike locks over the years, but none so far could justify the added cost. A newcomer that got its start securing ATMs for banks is trying to change that. There’s nothing wholly unique about the TMD Chain Lock , but the combination of materials, performance, and insurance-friendly ART-2 certification makes it worth considering. TMD’s first bicycle lock combines a Bluetooth proximity sensor and motion alarm with a slender core of hardened steel chain wrapped in a soft and lightweight sleeve of high performance Dyneema and Kevlar fibers. That makes this lock tough, yet flexible enough to conveniently wrap around your seat post when cycling. TMD also designed the keyless lock to be shareable with friends and family, and capable of withstanding shock, rain, dust, and extreme temperatures. That makes it highly suited to city bikes parked outside and ridden all year long. I like the TMD Chain Lock I’ve been testing, but spending €249 (about $283) on something that typically costs far less is a big ask. $280 The Good Strong yet flexible lock won’t scratch bike Digital key can be shared with friends and family Convenient if you lock your bike several times a day ART-2 certified for insurance Loud enough alarm The Bad Very expensive Lacks USB-C charging Annoying operating sounds The chasm separating ATM security from bike security isn’t as wide as it might seem. …