I needed a couple bike hooks with larger space to put the tire in. These work on my 27.5" mountain bikes. Mine's a little tight putting it in as the tires are a bit wider than normal, but it still fits. It's designed to be mounted directly on the surface the tire will be resting on. I had to add some wood below to keep the correct angle since I mounted these on a 2x4 attached to the wall.
Included are STLs for both left and right entry....though I realize you can just flip these in your slicer.
I printed in ABS with 5 line walls and 50% fill at .2 resolution. They haven't broken yet.
Thick walls are a must. Print them laying flat with large brims so they stick to the build plate. I just printed on blue painters tape with the bed at 100c. They pulled the tape in some but the bottoms stayed pretty flat with minimal warping.