Before I first rode SRAM’s 1x11 XX1 system, I had resigned mountain bike components to a world different than road components. It made sense after all, that over rocks and roots, through rivers and mud, that a mtb group simply would never function like a road group. Then I rode XX1 (reviewed here), was absolutely blown away and would not go back to 2x for anything. I rode regular XO before XX1 so that was my direct comparison. As such, when my Specialized Epic Expert World Cup came with SRAM XO1, I was both excited but hesitant. The last time I used XO, it was underwhelming, so I was definitely skeptical.
It turns out, I wasted energy with my skepticism. SRAM XO1 is practically identical to its XX1 brother. Not only does it feel exactly the same, but some of the components are the same weight (re: cassette). The difference in weight between the two groups is pithy, and as I recall its under 50g. The shifting is just as snappy, the cranks are stiff, and the rear derailleur is spot on. I can’t recommend it enough.
So what’s the point of XX1 then? I don’t know, color choice maybe? A stick recently jammed in my XO1 rear derailleur destroying it thoroughly. I sourced a replacement and found an XX1 derailleur cheaper than I could find an XO1 one. So, there’s that.
If you’re stuck between the two, don’t waste another second. XO1 is virtually identical and gives insane value.
Get it on Amazon here.