The issue is they don't come with a standard hex, but use the 18mm square!! Well turn on the CNC and get some adapters milled *:D Some photos:
Some measurements and some stock 6061 Aluminum laying around
First side done and test fitting.
Some custom washers to snug fit the nut:
And here is the result:
Used the wide axles, had to drill new holes, now they can be used for these tires or the standard hexes.
Some size comparisons with the Bowties I was using previously.