Printing out of hard TPU recommended for robustness, impact resistance and to avoid scratching - had good results with 98A but standard 95A would probably work. Originally designed to have a soft TPE grip ring, but I found it quickly got brittle from embedded dust and it kept slipping off the wheel (could try glueing). I therefore suggest using the ‘No Grip Ring’ version.
The author marked this model as their own original creation.