Grx gir og eldre skiftere

While it’s not often the case with new groups, GRX components are blessedly cross compatible with current road components of the same speed. For example the 11-speed GRX shifters would work with a current Ultegra rear derailleur, or vice versa. You do have to be careful about front derailleur and crankset compatibility though – GRX uses a +2.5mm chainline, so Shimano says you need to run the GRX front derailleurs with GRX cranksets, and road front derailleurs with road cranksets.