Are you sure you need to replace all those parts? I only did the nr 1 part and it works fine for me
It is being used with a 9s shimano casette, maybe you only need to replace the body if you want to use it for 10s? I also think the ring nut is steel in the mtb hub for extra strength and you don't nessesarily have to replace it but you can to save some weight, but I'm not sure. As said, only changing part 1 has worked fine for me so far.
I agree, and I never said you have to replace all 3 parts, I just pointed out which parts are different.
The only part you have to change is pos. #1, unless you want to switch to Campagnolo body.
If you use a 10 speed cassette on a 9 speed body, you just have to use a spacer ring on the inside IIRC.
Pos. #5 and pos. #10 are only different to offer more strengt on the MTB version vs. less weight on the road version I guess, but it shouldn't be nessasary to change them.