Mountain bike bicycle spiral lock mounting bracket

thingiverse

I designed this mounting bracket to secure a decathlon spiral lock onto my mountain bike. Check out the picture of the lock I used for reference. This design should work with other spiral locks too, as the hole diameters are 13.7mm (main) and 11.8mm (smaller). I created two versions to accommodate different bike frame sizes: - A 36mm tube version for mounting on the top part of the seat tube, which has a diameter of 35.5mm in my case - A 27mm tube version for standard seat tubes with a diameter of 27.2 mm I added a small piece of inner tube between the clamp and the frame to prevent slipping, but it's not strictly necessary. What you'll need are two M5 screws, approximately 20-25mm and 15-20mm long, along with two M5 threaded inserts that can be found on eBay (check out the image). I printed the parts in ABS at a layer height of 0.2mm, four perimeters, and 25% infill density.