Hej guys, new to the forum 
Pieter here, from the Netherlands.
I am Considering getting my hands on one of these framesets, but for a bit of an usual build. Checking the geometry, the chainstays are only 10mm shorter than my old 29'er mtb (which I don't have anymore). Makes me wonder, what is the absolute biggest tyres I would be able to ram in this frame? And how about the fork? Also, maybe I'm wrong here, but I seem to recall that 'racing' gears take 130mm of rear spacing, and 'mtb' gears take 135mm. Does this frame allow for a nice little 1x11 XT?
Thanks a lot!
Cheers,
/Pieter