Brompton rollers/wheels replacement with bearing

Inner discs petg 50% infill. Outter ring : tpu 100% infill (edited)

They looks great, printed in petg and tpu no supports need. Printed in different color for different mood! (edited)

No need for support. Great design. Thanks!

Hello Boris,

Thanks for the great Brompton wheels.

Problem:
Support is only needed for the M4 nut holes on the top part.

Support is not needed for Hexnuts.
Example of a MK3s+ Prusa print part as a sample solution:

Do you like to change your design a little bit so that support is not needed anymore? ;)

Edit:
Can you make a version for countersunk screws?
I think it's nicer when the screws don't stick out.

Can you still share how much perimeter (walls) and what percentage infill you used?

Thanks a lot (edited)

Printed on Bambu Lab X1 Carbon Combo in Prusament PC Blend for strength and durability -- orange to match the bike -- and black Sainsmart TPU. I used AquaTek X1 as hybrid support interface for the nut holes. I printed everything on smooth PEI for a shiny finish. It all printed really well and assembled great, exactly per the BOM. I even used the printed spacers. I did have to mount both rear wheels on the outside of the rack, for clearance, instead of mounting one on the inside of the rack like standard, but it doesn't seem to matter. I also had to add 3 standard M6 washers between the wheel and the rack, to fill the hole in the wheel next to the bearing and create clearance from the rack. I also made sure the bolt heads, which sit proud, were facing out so they wouldn't catch or rub on the rack. Thankfully the nuts sit almost flush and don't risk catching. Now my 2021 H6R rolls really smoothly, even though I used cheap bearings. Can't wait to ride to the grocery store. (edited)

These printed really well in PETG and in TPU. See photos. I used two printers. The Ender 3 Pro and the Creality CR-10 V3 for the TPU.

These are nice. However, they do not fit the Brompton rear rack. Very sturdy. I printed these in PETG and TPU.