Adapter plates to fit the smaller wheel diameter of smaller bikes/ebikes in the bigger wheel loops of Kac brand bike carrier (custom fit). Sits (and depending on print) and might even click onto the wheel loops, and zip ties are used to secure the adapter plates in place for an easy installation without modifying or damaging the bike carrier.
The ones in the picture were printed on a Bambulabs X1C and printed solid, but that is way overkill. I also printed on a Prusa Mk3 with various infill and all snapped cleanly onto the bike carrier. I suggest PETG for a little better weather resistance, and larger (0.6mm or bigger) is great.
The position is such that the bend in the wheel loop tubes is captured by the bracket ensuring it can't slide at all, so only minimal clamping is needed, such as zip ties is needed, even for bumpy rides.
Note: For Canadian viewers, this is the rack that was recently $36cad at Princess Auto…and it's one of the best bike racks I've ever used.
The author marked this model as their own original creation.