Two of the latest version of the rims printed, two to go.  

I'm printing them with my 'normal' formula for stronger PLA parts.  Some of this applies to most filament types, but not all.

• All walls, just because 100% infill was acting strange with a lot of rapids, and was adding like an hour to the print.
• 5-10% over temperature.  Must be combined with going faster generally and your hotend needs to handle it...
• 5% over extruded.  Surface quality suffers a bit, but most of the internal gaps get filled in for a stronger part.
• As fast as I can with as little cooling as I can and still not deform for my overhangs.  That turned out for me to be 60mm/sec for all except outer walls (which are at 45mm/sec) and 80% for cooling. I use an air pump for cooling though so it's very precise and localised with the superpower of cooling right at the extrusion point without cooling the entire part.  YMMV.
• 45C bed temp, and a small brim for bed adhesion.  Cleans up easily and stays put.

In other news, @Emil Novak has since printed a version of this for a local contest he's interested in, and tried it out.  

I'm not sure about his choice of tire aspect ratio as that caused issues for me, but it's certainly a start.  :)

He also has plans for trying out zip-ties as the tire material which he will probably get to faster than I can.

Waiting to see how that turns out, and as promised (if he's old enough), has been invited to the project.