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I believe the discs are hydro but the levers are mechanical. The red do-hickey would be the reservoir and piston. The new SRAM and Shimano systems have the reservoir built into the shifters
BikeWar 
What’s the red do-hickey sticking off of the stem?
Yeah we’re not sure either. Maybe someone can pipe in.
I believe the discs are hydro but the levers are mechanical. The red do-hickey would be the reservoir and piston. The new SRAM and Shimano systems have the reservoir built into the shifters
Thanks for the insight!