Bicycle seat post adaptor / shim
thingiverse
Seat Post Adaptor: Transforming Your Seat Post into a Clip-On Rack Compatible Solution. Print this adaptor at maximum infill density, then carefully compress it to insert it into the rack's hole. Once in place, allow it to expand and perfectly conform to its new surroundings before securely attaching it to your seat post.
Download Model from thingiverse
With this file you will be able to print Bicycle seat post adaptor / shim with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Bicycle seat post adaptor / shim.