I would be very leery of them fitting. Not because they're not high quality, because they are. (they're outstanding.) But, think about it from a simple space issue.
The adapters have three tapered posts (drilled & tapped,) which need to fit
between the spokes... Ref the pic below from his site.
Now, if the wheel has 36 spokes, this is 18 per side, and there is an evenly divisible number of openings (18/3 = 6) where the tapered posts could fit. (an evenly divisible (by three) number of spokes per side is important, as when you rotate the adapter on the hub, you should center the three posts in the spoke opening. But, if the openings aren't evenly divisible by three, when you center one in an opening, the other two posts will be off center.)
If you have a 32 spoke wheel, it will STILL probably work, because even though 16/3 is not evenly divisible (it's 5.33,) there are so few spokes that the opening between them is correspondingly large, so, the three posts should still fit, even though at most, only one post can be 'centered' in it's opening.
And, with 48 spokes, even though the space between the spokes is reduced, there IS an evenly divisible number of openings (24/3 = 8) so there is a decent chance that the posts can fit.
However, with 68 spokes, 34/3 = 11.33, so there
isn't an even number of openings. AND, there's
very little room between the spokes (only about half the space as between the spokes of a 36 spoke wheel.)
The 140 spoke wheel is even worse. 70/3 = 23.33, so it's not evenly divisible by three, AND, there's virtually no room between the spokes to fit the three posts...
That being said, your best bet is to contact Jim at
his site with this question. He will probably need more information though.