Originally Posted by
Eric F
I decided to go with the GRX 812 rear derailleur for the simple reason of keeping things simple.
I’ll stick the XT RD and Tanpan in a drawer in case I decide to go 11-46 in the future…or maybe I’ll sell them.
i went with an SRAM XD 10-42 cassette with my GRX 812 RD (1x setup) in order to run a smaller ring up front and still maintain some top end. the GRX is spec'd for 11t min but it works flawlessly on the 10-42. you could then go down a couple teeth up front. there's a pretty wide price range for those cassettes, but lots of choices.