Originally Posted by
loheiman
My Force 1x crankset came with a 42T chainring and I considered going with a 11-46T cassette but instead I opted for a 38T chainring and 10-42T cassette, which results in almost the exact same gearing. I went this route so I could have a lighter cassette but you do need to get a XD freehub for your rear wheel. While the RX812 probably could shift the 46T, and almost certainly with a roadlink, you should have no issues the 42T big cog. Not sure about 10T small cog though as it's rated for 11T. Are you set on Shimano GRX vs Sram Rival 1x?
Going to XD would mean I’d need to replace the free hub body on two wheels (650b & 700c) so I’d avoid that.
Sticking with Shimano would just mean that I’ll have fewer parts to swap out. I’d be upgrading my Giant Revolt 2 with the Shimano Metrea crankset I mentioned and so I could retain the crankset and BB and the brake calipers since they work with Shimano hydro levers.