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46/30/20 would be just about perfect.
Is that possible on a road bike ?
You might struggle to find a front dérailleur with the 26T range. Shimano FD-T781 is probably the closest fit to your desire, as it's optimised for 44-48T big rings and has 22T capacity, but I don't know whether it will play nicely with road STI/Ergo/Dubtap. If you have a non-indexed downtube or bar end lever, you should be fine. TA Carmina/Vega cranksets are still available in the slightly old-school MicroDrive 94/58 pattern which will allow a 20T inner ring. So, it's possible, but that doesn't mean it's advisable. You end up with some weird components when it would probably be better to get off and walk :-)
gbj_tester
For all day solo riding on my current 10-speed compact double, I find a 46T big ring is perfect and puts me mostly near the middle of the cassette. I don't care about sprints or going fast down hills, so I don't need anything bigger. I ran out of low gears on a recent JogLe.
I might want to go up an alp one day and I have no pride or sense of shame, so I think my next bike should have triple with the smallest granny ring I can get. 46/30/20 would be just about perfect.
Is that possible on a road bike ?