There's probably a grub screw holding the bolt in place.
There isn't.
Found the same brakes on another bike and they're loose too. Maybe its normal.
@philxthomas started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
There's probably a grub screw holding the bolt in place.