Amazon.com : ABUS 2023 Framelock Granit Xplus 6950M AM NR BK, Key Removable When Unlocked, Fits Most Bikes, (1-Pack) : Sports & Outdoors

A simple cafe lock like the Abus 6950 (sometimes called a frame lock or a ring lock) comes standard on most city bikes in Europe. They’re convenient and add a modicum of security for quick stops. Why cafe locks are so rare in the U.S. is a mystery. EVERY city bike should have one to go with the U lock most cyclists already have.The Abus 6950 lock solves the single worst conundrum of cafe locks—bike fit. Cafe locks need to be mounted on a bicycle’s seat stays and the distance between seat stays can vary a lot depending on a bicycle's tire width and other factors. Cafe locks usually are designed to fit a fairly narrow range in seat stay widths, so it can be easy to buy a cafe lock that turns out not to fit your bike—especially true for mountain bikes, e-bikes and other bikes with wide tires/wider seat stay distances.The Abus 6950 is the only cafe lock that has ADJUSTABLE mounting flanges that allow this lock to fit the vast majority of bicycles.The 6950 is also heavier duty/more secure than most other cafe locks, can be ordered keyed alike with other Abus locks, and comes with Abus’s most secure X Plus type keys.All in all, it’s a convenient lock and overall a superb design. I have one on my city bike and recommend it.One additional detail….unless your city bike is specifically designed for mounting a cafe lock, meaning that it has welded on threaded mounting points on the seat stays, you’ll need to purchase cafe lock adapters—they’re like heavy duty zip ties that have threaded bolts attached for mounting the cafe lock and then in turn are mounted on your bikes's seat stays. The cafe lock adapters are easy to install, secure and inexpensive. However they do NOT come standard with many cafe locks, including the Abus 6950.