Why not just get some ivan wheels? I've seen them on ebay for about 20-30USD...
Rick
IXNAY on the Bey-AY-AY.
I think the PP wheels would work great...

If I happened to quickly run down to my basement and count the teeth, not that I have two PP wheels down there, or anything... by a quick count/ estimate I would say it looks like the same tooth count.
Of course that would only be if I happened to have two PP wheels for sale... not that I do. Because if I did, the proper thing would be to recuse myself from this discussion due to a conflict of interest.

Tomorrow I can compare the mounting flange bolt patterns, and also tell you how deep the gear/ encoder are on the PP wheels.
in the meantime, here's a picture of the gear/encoder assy. Is this the same setup on an Ivan wheel?
