The critical part of your suggested measurement is in your own data. Earlier you gave a measurement of 47.5 mm for the carier spacer. Now you show 46.5 mm for a carrier spacer. This spacer may not, and is probably not, the same from wheel size to wheel size due to the offset differences we are finding in this thread. Therefore useing the same carrier and spacer between the 2 wheels could add some inacuracy. You would need the original carrier spacer from each wheel and then use the same carrier to make that measurement. This also assumes that the casting ridge on all wheels are at the center of the wheel, and the same thickness. Those two you show probably are, but others, mostly later wheels may not. The other problem here is that most people only have the replacement wheel and none of the spacers, carriers, ect. that came with the replacemant wheel. Wheel center remains the only constant that you can trust and measuring from there as I have shown is the only way to be sure. It's up to you to decide how acurate you want to be and do what it takes to get there. Is a mm or 2 error a problem? probably not. But I've always been of the school that a job worth doing, is worth doing right. John, I know your trying to do it right. I;m not picking on you, I'm trying to help. I have done this stuff many times in the past. I don't have any extra wheels and parts to redo my past findings for you or I would do a pictorial as you are doing.
Maybe if I explain why you eliminate some things it will help.
The spacers between the swingarm and the sprocket carrier maintains the alignment of the chain. You don't want to change that. The spacer and caliper carrier maintain the alignment of the disc and caliper. You don't wanto chang that. With a wheel swap you just want to account for the difference in wheels. The bearing placement and in some cases (not applicable here) the disc mount spacing. You want to use the measuring formula in my previous post to find those differences. If the disc is off after that then to maintain wheel center You have to modify the disc mount to allign it with the caliper. Add a spacer under the disc, remove material from the wheel, find another disc with the right offset. Moving the caliper and modifying the brke stay is also an option as long as the wheel center is maintained.
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