I have the Aeron x and it's very good for the value. Not sure of the Ultron vs it but they make good wheels I have had two different sets and clients have bough as well no issues for any of us.

The prices have gone up the last few years though as I got the disc and a 88 front for much less then they cost now.

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Thanks a lot!

I am still hoping for an opinion on the Ultron disc. Any reason to believe that it is faster than the Aeron X?

As an owner of the current AeronX disc and also the Ultron front. My interest peaked when they announced the Ultron disc.

If they start saying it’s x watts faster than the AeronX I will smile - as a disc is a disc and would assume there isn’t much between them.. in the real world. Only reason to go for the Ultron is if you can / wanted to run 30mm tyres I would think. The Aeron x takes 28mm no issues thou!

One thing to consider…. It’s still a spoked wheel under the skin!!! this really disappointed me. Still not a ‘full carbon’ wheel

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Regards, Richard

Thanks for your reply.

I don't think that I need 30 mm, as I am pretty happy with 25 mm on my 60 mm wheels.

Are all discs really equal? There must be a reason that most pros ride certain discs, apart of sponsorship.

Does the spoke structure change speed characteristics?

If I run a 60 mm wheel with a 25 mm tyre in front, and a disc with 28 mm in the rear, both being tubeless, should I in general use different pressures?

Most discs are similar, but there are differences between a lenticular disc and a flat disc. My understanding is that the lenticular discs tend to be faster, although flat discs may be better on frames that shield the rear wheel.

You may find you'd want to run a 28mm tire on the rear. If it fits well with your wheel, that's an even bigger plus, and a little extra compliance can help maintain even power on rough roads. You should definitely run different pressures. I'd start with measuring the mounted tire width on your wheels and using silca's pressure calculator.

There's no aero difference between a spoked and solid carbon disc. Some think the solid disc is more premium, they do tend to be lighter. A spoked disc may be more compliant, although IMO if you're running a 28mm tire at the appropriate pressure you probably won't feel a difference.

For me, as the obvious and most important part of a disc wheel is the wosh wosh sound, there is no way I would buy a spoked wheel.