70sSanO

I’ll summarize this…

You have a 126mm OLD RSX/Mavic rear wheel and you want to replace the Mavic rim with a Ryde rim leaving you with the same 126mm OLD RSX/Ryde wheel. Then you are planning to add “a” 4mm spacer (between the DS cone and the locknut?) to get to 130mm.

First off, if you are really saying (2) 2mm spacers with one on the DS and one on the NDS, that will work. I prefer 0mm DS/4mm NDS, or even 1mm DS/3mm NDS, for a stronger wheel.

Is you RSX A410 hub and freehub body in excellent condition?

You should make sure the races and cones are in really good shape to make it worth your while. Remove the freehub body, while still laced, flush it out, re-lube, and re-install.

Your spoke length is probably fine. I’ve swapped out a 7 speed freehub body to 8-10, and vice versa and re-dished the wheel without any problems, so 1mm is probably not that big a deal.

Finally, do you really want to run 7 speed with 130mm dropouts? I’m not suggesting that you maximize your speeds, but going to a 130mm 8-10 wheel will give you options down the road.

John