Giant Defy Advanced Post Mount Mechanical Disc Brakes - upgrade to Hydraulic

hairy_boy Posts: 345
edited April 2020 in Workshop
I have a Giant Defy Advanced 3 from 2016 which is fitted with the stock Tiagra 4700 10 speed shifters and mechs and TRP Spyre mechanical disk brakes.

The caliper mounts on the frame are Post Mount, which makes things tricky as most brakes now appear to be flat mount !

Love the bike so considering an upgrade to hydraulic disc brakes and hoping for some advice on which STI shifters and POST MOUNT calipers to go for - happy to move to 11 speed.

Hope someone can advise ?