Brifter reccomendations

[interwebme]

I'm looking for brifters that will be compatable with shimano grx 600 rear derailleur running shimano rd-rx812 11-42t 11 speed cassette that can operate mechanical disc brakes.

I think the standard grx 600 brifters can only do hydraulic and I'm not keen to change the brakes.

Perhaps 105 ST-5800 would do the job?

[ReapThaWhirlwind]

Any shifters that operate long cage for Road on 11 speed Shimano will do it for you.

The one you suggested will not work. The 5800 series only seems to have Medium Cage, meaning they only shift to 32T max.

You'll need R7000 or better for 105 shifters.