Ultegra w/o front derailleur

[Power13]

@Craig_G

I think you’ll want both the narrow/wide chainring made for 1x use and also a new RD with a clutch

For a TT bike, I think you can skip the clutch RD. I’ve run a 1x Ultegra mechanical setup for about 18 months on my gravel bike with the stock RD. Dropped a chain one time, I think.