Fusion 360 file for a Boardnamics 40T kegel style wheel pulley. You can use the file for design, or you can print a pulley to check fitment etc. I don't know if I'd recommend printing one for skating use because of how fragile the kegel pegs would be, but you could probably remix and use stainless rods instead, inserted into the pulley. Have at it and enjoy.
The author marked this model as their own original creation.