I'm using an xt sgs 12 speed derailleur on a Garbaruk 11-50 11 speed cassette with xt 11 speed shifter. Works perfect. So shimano 11and 12 speed are compatible. While I was researching this the internet told me over and over that not only is this true, but apparently Sram 11 speed and 12 speed are also compatible. With themselves and Shimano. So basically I could have just as easily used an XO 12 speed derailleur with the shimano 11 speed shifter. But I didn't. But you can see where I'm going.
March 15, 2021, 6:43 p.m. - edgibson22
I'm using an xt sgs 12 speed derailleur on a Garbaruk 11-50 11 speed cassette with xt 11 speed shifter. Works perfect. So shimano 11and 12 speed are compatible. While I was researching this the internet told me over and over that not only is this true, but apparently Sram 11 speed and 12 speed are also compatible. With themselves and Shimano. So basically I could have just as easily used an XO 12 speed derailleur with the shimano 11 speed shifter. But I didn't. But you can see where I'm going.