Peak mechanical: Tiagra 4700 Shifters with GRX 12s RD

A few days ago I've posted about the great capacity of GRX RX-RD820, today I'm confirming that the Grx's 12s pull ratio works perfectly fine with Tiagra 4700 10s shifters. Turns out Shimano has kept the 11s road pull ratio in 12s group sets and that is a great news!

To have some proof behind my words, here's a quick, very clumsy video of the test. I had to operate the shifter and the pedals with the right hand, whilst recording with the left, couldn't really capture it the way GCN does it :)