U-Lock Holder - B-RAIL System
Print Profile(1)

Bill of Materials
Description
UPDATED VERSION 1.1
This new version improves the fit and fixes a small interference issue that a few users reported.
Thanks a lot, and sorry if you already printed the previous version without success! Please let me know if you run into any new issues.
This little bracket lets you clip your U-lock onto the B-Rail System so it’s always right where you need it.
- Comes in 9 sizes to fit different U-locks sizes
- Works with lock diameters from 10 mm up to 18 mm (in 1 mm steps)
- Just pick the size that’s closest to your lock. (The printing files has all different parts in it, just choose the right one!)
What you’ll need:
- 6 × Button head self-tapping screws (M3-12 mm long), Maker’s Supply part number: AA144
design note: there is no metal inserts or machine screws for two reasons:
- It takes up less space, making the bracket slimmer.
- Thread-forming screws usually stay tight under vibrations, while machine screws tend to loosen (unless you use threadlock!).
About the B-RAIL System :
The B-RAIL System uses a mounting rail designed to fit any standard bottle cage mounts on your bike. It lets you attach a wide range of accessories and swap them out in seconds. Here is the link to print the mounting rail:
https://makerworld.com/en/models/1790757-official-b-rail-mounting-rail#profileId-1908428
Please share improvement suggestions or accessory ideas in the comments.
I hope you enjoy your new U-Lock Holder!
Membership
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License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.











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