Great, more model numbers that probably don't make sense.

For example, I know 8070 is Ultegra Di2 disc, 11 speed. 8170 is the 12 speed version. 9000 series are Dura-Ace and 7000s are 105.

But I only know that by memorizing the numbers - there's no pattern I can discern, beyond the first digit. For example, why should a 1 in the second digit denote 12 speed? I don't see the logic.

Now I see we have a bunch of things labeled Cues (whatever that means) that will be different setups. It would have been a good chance to come up with a sane numbering scheme, but it looks like they didn't do that, based on the article.

I have nothing against 9x drivetrains, up until last year I was still using my trusty 3x9 MTB setup. When it was time to finally retire that 30 year old frame, I started from scratch with a mix of GRX and XT components to have the best of both worlds for my long distance rig. That frame has thru axles and is built for Flat Mount calipers.

I wonder who the 9x Cues disc brake components are for. Bikes that are equipped with disc brake mounts (especially those that came after IS 2000) are probably not very old and may be equipped with 10x or 11x components already. On the other hand, guys who have old 9x drivetrains and 135 mm rear hubs probably cannot mount the disc brakes on their older frames. What am I missing?