good shout - doesn’t look like it is limited to Di2 / Shimano though as also showing up on the SRAM models
The Shimano models use Shimano’s integrated Dura Ace crankset PM. The SRAM models use SRAM’s Red AXS integrated crankset PM.
It’s more about the frame models than the builds. If you want to offer the same model (Ultimate, Aeroad, etc) in both rim and disc brake then you’ve got significant extra production costs as effectively you’ve just doubled the different types of frame you’re producing - rim and disc brake versions in every size. And from a frame design perspective may mean compromising your ability to optimise around one brake type. Air flow is different with rim and disc brakes, as is the cable routing, and also the places where you may need to stiffen the frame to deal with braking forces. So a frame that can be produced in both rim and disc brake version with minimal changes (i.e. just brake mounts and cable runs) may not be as good as a frame which has been optimised just for disc brakes.
For these reasons I think over the next few years we’re pretty much going to see rim brakes phased out on every bike model that is only sold with 105 or higher. Rim brakes will only be offered on models which are still sold in Tiagra and Sora builds, and even that may change over the next few years if road bikes go the way of MTBs and start having disc brake options on low end groupsets.
…isn’t the Dura Ace crankset the one with all the accuracy issues that GPLama etc exposed?
Not sure if the SRAM one is better.
Yup, I think so. Whether the accuracy issues are bad enough to be a problem for the non-expert user I don’t know, but it’s a lot of money to be taking that risk!
SRAM is fine - measures power through the spider not through the crank, the various SRAM/Quarq spider PMs have always had pretty good reviews.
This is consumer driven, not supplier driven…bike buyers have made their preferences very clear over the last 3 years. Hell, I got a screaming deal on a canti-equipped CX bike in 2015 because the shop couldn’t sell it.
Bike companies know if they put out rim braked bikes, they are just putting close outs on the floor.
If any of you are still waiting for the new Aeroad, I would mark October, 6th in the calendar.
quote from their homepage:
4 years in development, 22 test loops, 4 months of super computer simulation.
On Tuesday 6th October at 18:00 CET we finally unveil all our hard work
looks like GCN is also going to be covering it:
sorry, i meant to say “ultegra” di2s
All us Americans are wondering why you posted a video that streamed back in June <_<
I think it is just what they have left in stock, which isn’t much. I contacted sales 2 days ago asking when they expected to get more Ultimate SLX rim brake Ultegra Di2 in size Medium, and they responded to me via email that for no more rim brake bikes would be offered.
Oh well…there’s still the Bianchi Otre XR4…looks like I’ll be shopping the used market.
Haha we’re all waiting for the US to change the logical HH:MM:SS to HH:SS:MM for equally no obvious reason 
Oh I see - they are offering rim brake in the 2021 model (i.e. the new one just released) but only in the SL model with a Di2 model coming at the top. The SLX is all disc.
Still good value for money Bikes, but I purchased mine 5 years ago for only £3,200 and got an Ultimate CF SLX Ultegra di2. Feels like even more of a bargain these days.
Today I got the response from Canyon Support. The linked Model with Ultegra DI2 uses the “4iiii Precision Custom” Powermeter.
Hmmmmm, not the best
True, I cancled my order…
Well, the new Aeroad is finally here. TLDR: lighter, more aero, wider tire clearance (30mm), hidden cables, disc only. So pretty much as expected, just about 10 months later than expected!
For anyone interested, looks like Frodeno is filming for the launch of the Speedmax Disc today (based on his Instagram stories).
You can just about get a glimpse of what I assume to be the SLX model give it’s difference to the SL I posted above. It looks like there is a single riser with ‘Y’ shaped extensions and no sign of integrated hydration based on what I can see (unless it is completely built into the frame or similar). Must be launching soon!