Somewhat awkwardly, the cassettes need the same Eagle 12-speed chain as SRAM’s MTB Eagle groupsets, rather than the slightly-wider Flattop 12-speed road chain. The cassettes also have the same ...

There aren’t too many flattop chain options. Honestly, I think SRAM is the only one (YBN makes one) with the pure flat top edition, which they developed for their 12-speed road groups.

SRAM has set out its pitch and forsaken the front derailleur for evermore with the launch of its new 12 speed, 10-50t XX1 and ... especially when in the more extreme chain angles.