The rim is 26.7mm at the brake track, yes

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

So with the feedback we have from triathletes the main thing long course triathletes are worried about is faff by the side of the road. Tubeless Corsa Speeds can be irritating to sort out with a tube if you’re not used to it, and GP5000s are just so unlikely to puncture that’s a more common choice. Of course the fastest thing will be a Corsa Speed no matter what kind of race you’re doing, it’s just a usability thing. For time triallists or triathletes who are racing in a situation where a puncture would be the end of their race, Corsa Speeds tubeless at least give you an extra level of puncture resistance before your race is over.

As for mounting the tyres the Zipps are incredibly loose aren’t they! I’d put ours in between the two, you do need a tyre lever but it’s not as tricky as the ENVEs. In our tests we found the ENVEs quite hard to seal tubeless as well with a Corsa Speed. It may not be obvious from our data but as one of the wheels (Zipp 858) wasn’t tubeless compatible we still used the TL version of the GP5000 on everything for consistency, but just with an inner tube inside.

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

TITAN for 23mm. We will release more public data on further tyre testing (with the tyres that we would recommend people use), the GP TT is on that list but for all the current public stuff we wanted to keep with tubeless only tyres for consistency, to avoid confusion and because that’s what we recommend in any case. Too many graphs just get a bit lost in the noise so we wanted to make things clearer for customers as much as we could.

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

Does the rim bulge out wider than 26.7mm in the middle?

Yes.

This may be a bit off topic. but how does the new wheel compare to the old aluminum rim 100? I was thinking of getting one of the 100mm aluminum wheels, but it looks like I missed my window of opportunity (unless you have some floating around that I could still get)

We’re not making them any more I’m afraid. They were so difficult to construct compared with our other wheels it was better to focus on the previous shallower wheel (the AEOX 75).

The TITAN is marginally more aero, but more importantly is far easier to handle so you can run it all the time. It’s also lighter.

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

How much watts will I save if I switch from Hed jet9 black + Jet Black Disc to your Titan/Disc combo?

Look at the chart. Jet9 looks to be faster 0 to 7.5 yaw. The titan comes out ahead overall in this data because of the high yaw drag values. I would count on the Jet being slightly faster at most races. Your combo is probably a good as it gets and you will gain little to nothing by spending money to make the change. With braking from your aluminum tracks you probably save seconds at sharp turns. I honestly think you have the fastest setup out there, especially once you consider later braking points.

Similar case for zephyr vs Enve. They're almost the same averaged over 0 to 7.5. The average watt numbers look better for the zephyr because of the 7.5+ yaw data.

Xavier, any plan for developing an aerocoach trispoke? Front wheel.

As mentioned above it is close (although the TITAN is exceptional at 0), what tyres are you using?

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

How much time saving in HIM with your titan/disc compared to FLO 60/FLO disc with gp5000?

One of our employees is keen but it’d be a really big R&D investment so only if we think it’ll be worth funding. Given the speed of the TITAN/ZEPHYR it would take a while - although we already have a wheelchair trispoke on file that we’ve finished all the CAD, CFD and tunnel testing (in 20” size) that might go into production later in the year, potentially for Tokyo 2020. A full cycling trispoke is a bit of a different project in terms of the construction and compatibility though.

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

Corsa speed Open TLR 23mm (I believe 1st gen?) with silca latex tubes.

Thanks for the answer. I had seen the trispoke on the wheelchair on instagram and was keen to see if you had something in the making for cycling. Count one buyer in if you develop one.
Quite a few teams at the tdf running trispokes this year in the ttt.

It depends on your speed and width of the tyres (23 or 25?). The ZEPHYR front wheels are faster than TITAN if you have 25s, that flips round if you’re using 23s.

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

Let’s Change it to zephyr/your disc
Tires 25
23 MPH

I can have you add a power meter to the disc correct?

Thank you

From our published data it’s 1.1w (using a weighted drag protocol) for a front wheel, and 1.3w for the disc (all at 45kph).

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

So a ZEPHYR would be better than a TITAN in that case.

We haven’t put Flo wheels in our published graphs I’m afraid but they are good (regardless of what a certain wind tunnel “test” says!). In fact we found a 23mm GPTT to be a really good fit with a Flo 60 from a Crr + CdA combined perspective.

Yes we can put a Powertap in the disc.

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

Did you some comparison with 2spoke wheels. They look very fast. (They say it's faster then a disk) but I don't have seen the test data.

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Follow my project on Project 100 miles / 4 hours

Yet again HED comes in second in someone aero testing. :)

Yet another piece of evidence that if you just want to check the "aero wheels" box and not worry about it, get HED.

Nothing against these wheels - they look great, and have my full attention.

I’ve spoken with someone that’s done aero testing with them, they said they’re fine but nothing special.

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

HEDs are good for sure. Just a tyre width thing with the Jet 9+ front, if you run a 25 it's slower than a TITAN 23/ZEPHYR 23/ZEPHYR 25 whereas there's no penalty on a ZEPHYR with a 25.

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