Can I use a 3x10 or 2x11 front derailleur on a 3x11 drivetrain? I recently started changing the drivetrain on my Trail 6 (2020) and I wanted to jump to 3x11 from the 2x9 mixed Altus/Alivio it came as stock. My mistake was not paying attention to the type of pull my frame was built for, for the front derailleur: it's bottom pull.
I have all the components installed on the frame: 3x11 22-30-40 XT crankset, 22-40 11spd sprocket, 11spd XT chain with 138 links and 3x11 SLX Shifters. But the front derailleur had front pull which, sadly, cannot be used on the bike's frame. For the moment, I'm using the default 2/3x9 Altus front derailleur but, as you may assume, it's kinda bad (25% of the ratios cannot be used due to excessive chain rubbing and whatnot).
After extensive search, I've realized that there are no 3x11 front derailleurs with bottom or dual pull... only 2x11 or 3x10. Since i`m not gonna return the drivetrain (I've tested it for 2 days and it started showing signs of wear/tear, as is normal), my question is: can I reliably (or semi-reliably) use a 2x11 or 3x10 front derailleur with a 3x11 transmission? If yes, which of the two is more recommended?
In case someone else finds himself/herself in my shoes, here's how it all turned out for me... so, the previous FD was a 2x9 Shimano Altus and it still managed to move the chain from one chainring to another. Since there was no 3x11 option with a different type of pull, other than front, i took a chance and ordered a 3x10 Deore SLX. Besides the usual min-maxes which cause chain rubbing, i also have some chain rubbing when on the mid chainring with the 2 largest sprockets. Otherwise, shifting is good, 9/10 it happens without any delays or the chain getting stuck between gears. I am still observing the behavior of the whole setup but as far as front derailleur goes, 3x10 seems to have ~93% compatibility with a 3x11 drivetrain. Thank you all for your time and answers.