I have a trekking bike with a slightly short reach for me. On the other hand I wish to get a drop bar bicycle. I could check on this bike that the position is good with drop bars.
On this bike I have on front wheel a Magura MT5 disc brake, and on rear wheel a HS11 Magura rim brake, of course both hydraulic. My frame is rim brake only at rear. It used to be a 26in bike, but I could put 27,5 (584 mm) and adjust rear brake on it.
I have read that MT5 can work with Shimano road levers, but could not find information about HS11. I guess the question is on piston area.
Is it possible to make work HS11 and shimano hydraulic road lever (such as Tiagra 4700, GRX 400/600, or 106 R7000, to be defined).