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@kiskubai
Lets start with a couple of things Ive already had for this build:
Crankset: Praxis Zayante AL.
Originally I wanted to put my all-time favourite Dura Ace 7800 crankset on this. However, I found that it was a lot easier to find a narrow-wide chainring for 110mm BCD rather than 130mm. So the praxis had been stripped from one of my other bikes.
Dont mind the chainring bolts. I bought the Hope 42t narrow-wide chainring from @m_xprez_j to go on it. The frame specs stated that the max chainring it will take is 42t, and I was slightly annoyed by this as I was planning to use this bike on road as well. But a quick trial with my Praxis chainring shows that it should take even a 50t no problem. With a NW chainring it will be a closer fit, but it should be fine.
Other parts Ive already had at home:
-Whatever random saddle I'll put on it
-FSA drops and random stem, this will likely change
-Shimano M540 SPDs
-25mm gatorskins (just to get it rolling, on the lookout for gravel / cyclocross tyres)
-Ultegra 6700 shifters from my other bike
This has determined that it will be a 1x10 bike. My road bikes are 10sp as well. I found a long-cage 6600 ultegra rear mech at home that should handle up to 32t. But as soon as my derailleur hanger arrived, I quickly discovered why I had that rear mech in a parts bin, and not on a bike:
Left side is the 6600 rear mech, the right one is my 7800 DA borrowed from my training bike. At least we now know that the frame and the derailleur hanger is fine.
I was looking for something that would work with my 6700 STI's pull ratio, and found that the first XT Shadow line originally intended for 9sp does just that. It should work properly on 10sp cassettes with these STIs. Thankfully LFGSS came through, and I bought one from @nikitos the same week I started looking. These weight about the same as the Ultegra, coming in at 228g.