Very cool,

On a side note I have been microing (word?) a lot of tires at 100 psi and on Enve 7.8, slightly (about 1mm narrower) on new zips.

GP 42k 25’s at 30 mm!

GP 5k 25’s at 26.9 mm.

As mentioned before on here run only a 23 4K up front.

The 4K rs measures truer to size at about 27mm

Maurice

If anyone's got any further questions feel free to ask - there's quite a bit of data but didn't want to go overloading the website with too many graphs. We also made a personal tyre pressure calculator the wheels which we've put here:

https://www.aero-coach.co.uk/aeox-wheels-tyre-data

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AeroCoach UK
http://www.aero-coach.co.uk

I see that you mention reduced side force on your wheels. I’m interested in using the 100mm deep titan wheels, however I’m a bit afraid of stability in 100mm deep wheels. How do the wheels compare to say a zipp 808 and 404 in stability? Force reference I used to road race on 70mm deep Aeolus 7 wheels

I see there is some texture on the braking surface. Is this to improve braking?

Although the rim depth is 100mm, we spent a very long time in CFD making sure the side force was as low as possible so that the TITAN wheels would be rideable in the real world. There’s definitely no point having something that’s theoretically fast if you could never ride it - and as part of the development we did find faster designs that would have been too tricky to ride. Last week we had a male 59kg rider do a UCI national TT champs in 30kph crosswinds using the TITAN front and his feedback was that it was shockingly stable which is good. Better than an 808, we get feedback from riders at sessions that they have issues with 808s quite a bit.

Yes the brake track is laser cut with a pattern designed for good braking. Works really nicely in the wet if you’re unfortunate enough to get caught in the rain.

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AeroCoach UK
http://www.aero-coach.co.uk

Any plans for a disc cover for the Zephyr? That would be a pretty sweet option as you could optimise the design for the wheel.

Also how much would I gain going from PX 82 / 101 with veloflex extreme / carbon tubs to Zephyrs?

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http://www.tri-monkey.co.uk

Kudos for a great looking wheel at a good price point.

Slightly surprised your pressure calculator doesn't have an option to factor in road quality. Appreciate that this is somewhat subjective, but IME it's a big factor in finding optimal pressure, even when only talking about speed and not comfort. Do your tests show that it has no impact, or is it simply that there isn't a good objective way for your average rider to measure it?

We could do but the CAD/CFD and mould development cost would be quite high so you’d be better off with the full disc really.

PX 82s and 101s are really narrow and always pretty bad aerodynamically unless you’ve got the old Crono 20mm tubs which are like gold dust these days! You’d instantly see some big improvements from upgrading the tyres on your current wheels but the ZEPHYR pair would be a solid upgrade, you’d get more from the front wheel than the back, but potentially >10w from tyres alone and then probably similar for the pair of wheels, maybe more depending on the tyre width you’ve currently got.

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AeroCoach UK
http://www.aero-coach.co.uk

Thanks :)

Yes it’s something that’s tricky to factor in as everyone has different tarmac properties near them as well as perception of what is rough vs smooth. It does make a difference for sure, but not as much as off-road so you’re not going to changing by >5psi really. Always best to err on the side of too low than top high!

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AeroCoach UK
http://www.aero-coach.co.uk

Thanks and wow, so potentially 20w from a straight switch to the Zephyrs with Conti 5000s?

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http://www.tri-monkey.co.uk

Thanks - is it safe to assume the calculators err on the conservative side, so for super smooth roads there could be a small benefit in running at ~5PSI higher?

Have already put my Zephyr order in, partly as I have to deal with some crosswinds that get pretty strong and partly because I'm not convinced yet by tubeless and if I want to run clinchers with latex then the Zephyr is more forgiving of slightly different tire shapes and sizes? Where the Titan is very much optimised around the Victoria 23C tubeless?

Looks like the calculator gives low pressures.
Compared to the "standards"
Is it pure the earo or also the rolling resistance?

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Follow my project on Project 100 miles / 4 hours

20w to the Vittoria Corsa Speeds, there’s just over a 7w difference Crr wise between Corsa Speeds and GP5000s.

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AeroCoach UK
http://www.aero-coach.co.uk

Thanks for the order! Yes the ZEPHYR is pretty impervious to tyre width changes, but the TITAN is a 23mm Corsa Speed only wheel. If you’re running GP5000 25mm then the ZEPHYR is actually faster than the TITAN and so would be the better choice.

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AeroCoach UK
http://www.aero-coach.co.uk

Tyre pressure recommendations on the website are based on rolling resistance benefits. It may seem low compared to traditional recommendations but we’ve done so much testing on it and with more modern wide rims (like ours) you definitely don’t want to be pumping wheels up to 100psi any more.

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AeroCoach UK
http://www.aero-coach.co.uk

Great results for H3+ in this test too!! Shallowest wheel performed very well in testing and still maintain aluminum brake track. Glad I went back to this wheel.

I'm very interested in what you've found testing Crr. Awhile back you stated that you couldn't get Crr <.005 on UK roads. Is that still so? Noticed any speed dependence?

You can on some but usually it’s only sections of a TT course rather than the whole thing being <0.005

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AeroCoach UK
http://www.aero-coach.co.uk

Dumb questions probably.

1. Can you run Zephyrs with tubes - if yes, how does it impact the performance for say GP5000TL?
2. What type of brake pads do you recommend?
3. Do you ship to the States - or do you have a local distributor here?

Thanks!

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Next races on the schedule: none at the moment

1. Yes absolutely - we recommend using Vittoria latex tubes rather than Michelin latex tubes as we find the Michelin’s a bit fragile at the valve stem area. We can supply them with the wheels. We find no difference in Crr between tubeless and Vittoria latex tubes, so it is just your preference.
2. All the AEOX wheels come with our specific carbon brake blocks included, which you should use with the wheels.
3. We do ship to the States no problem :)

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AeroCoach UK
http://www.aero-coach.co.uk

The specifications for the Titan wheels says:

"Rim width external (brake track): 26.7mm".

That seems to be wrong.

That’s correct, it gets wider further down the rim

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AeroCoach UK
http://www.aero-coach.co.uk

Is the brake track 26.7mm wide?

Can you elaborate on your recommendation against long course triathletes using the Corsa Speed? On a range of Zipp (easy) to Enve (incredibly difficult) . . . how easy is it to mount the typical tire on these wheels?

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Dimond Bikes Superfan

So if you were to run another brand 23mm tyre - eg a Conti SS or TT would you recommend a Zephyr over a Titan?