I was looking at this spec sheet and all looks simple except how does the turning work.


XYZ ONESEATER construction plans

Is there an academic text or book that explains the physics and build choices?

In general is the spec sheet in the link sufficient to build the trike?

I was assuming ball bearings would be involved in a turning mechanism but don't see their use.

From original article:

Instead of using ball bearings for steering parts plastic washers can be used.

  • Welcome to to Bicycles SE. This may or may not fit within the scope of this exchange, but I will let some of the more seasoned members use their experience on that decision (they would likely direct you to another exchange if it did not).
    – Ted Hohl
    Dec 9, 2023 at 23:41
  • 1
    requests for new tags typically happen over at the meta site
    – Paul H
    Dec 9, 2023 at 23:49
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    Tag created - it took a while to realise they don't make bikes in the common way.
    – Criggie
    Dec 10, 2023 at 1:07
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    Take a good look at the part that those two ball-tipped handles are attached to: It forms a rectangle where "self-greasing plastic washers" and "axial needle bearings" are used at the four corners. Those are the moving joints in the steering. The front wheels are attached to the short sides of the rectangle. Dec 10, 2023 at 9:21
  • @cmaster-reinstatemonica that's an answer!
    – Criggie
    Dec 11, 2023 at 0:03


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