Review on 🔒 NDakter Foldable Chain Lock for Bicycles - Bike Burger Locks Heavy Duty Anti Theft - High Security Alloy Steel Locks - Includes 3 Keys, Mounting Bracket - 2.6FT/79CM by Jon Higdem

That's a great concept. Additionally, there are at least a dozen brands that sell this particular lock, so check which one is cheaper. I chose this one because it was the only one that advertised mounting holes for a water bottle mount. However, there are two things I don't like about him; First, it needed lubrication after less than a month of use (WD-40 did the trick). Second, it's less convenient than expected. It takes a bit of work to mount the frame + a wheel on multiple bike racks - I feel like I had less fiddling with some of the big U-locks I've had before. Next to. I like how it becomes compact. However, if I buy a different lock, I use the classic U-lock.