None :) you just let us know in the order comments and we build the wheel with better clearance on non drive side for you (they’re all hand built).

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

Cool Thanks!

Some stupid question,Is a stroke in the disc wheel repairable?

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Follow my project on Project 100 miles / 4 hours

Do you mean a broken spoke? No, but we’ve never had a spoke break so far and we’ve sold lots of them so there’s no need to worry.

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

Does a 3:13:37 /100 mile TT come as standard with the wheel package..?

https://www.facebook.com/...d&epa=SEARCH_BOX

Aha! Quite a performance wasn't it, just shy of 50kph for over three hours.

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

Couldn't have done much better myself..! ;-)

I am interested in getting the ZEPHYR + AEOX disc for my Speedmax CF SLX. Performance comparisons seem pretty good. I am, however, not convinced about the build quality. What is your opinion on the "gap" construction issues mentioned in this article [1]. Is this something that is still applicable for the new wheels?


[1] https://www.hambini.com/...hich-one-is-fastest/

No, it is not relevant as the ZEPHYR and disc are full carbon clinchers.

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

I have no association with Aerocoach nor do I have any hands on experience with these wheels. But a few points to consider:

• The general consensus by those in the know is that Hambini has no credibility.
• The new wheels are fully carbon, not aluminum rims with carbon fairings, so the gap issue is not relevant.
• Typical of his rather "out there" findings are that the holes in the older wheels with aluminum fairings caused 15w of drag at 50km/hour. Hed wheels have significant gaps around the spokes and they typically do well in wind tunnel tests. And as I mentioned, that issue is irrelevant to the new wheels.

Just some points for you to consider.

15W at 50 kph for those gaps is priceless. I've tested a Jet 9 with similar gaps several times both on the track and outdoors and those gaps are surely not worth anything near 15W - unless, of course, the rest of HED's wheel design somehow makes up for those 15W in other places compared to both other deep profile wheels and disc wheels, but I highly doubt that.

Thanks for your answers so far!

I tried the tyre pressure calculator and is curious to why your aero test data says 90psi when the calculator yields 90psi for a rider weight of 90kgs for 23mm and 94kgs for 25mm. Even including clothes and helmet, isn't the average rider lighter than that?
Also, on the old Vittoria Corsa Speed the pressure limits stated on the tyre was 87-130psi. According to the pressure calculator 87psi is recommended for a rider weight of 85kgs on 23mm. So your recommended tyre pressure will be lower than the stated pressure limits by the manufacturer for every rider weight lower than 85kgs...

I find these pressure numbers odd, am I misunderstanding the calculator? Can you explain more about the calculator or about the decision to aero test the wheels with 90psi?

We started doing aero testing at 90psi a while back and so kept with that, there’s not really much more to it apart from making sure it’s consistent. We might use different riders for test days for example but need the tyre shape to be the same (in the tunnel the bike is suspended on struts rather than all the weight pressing on the rollers).

I honesty don’t know why manufacturers suggest such high psi - it must be as a result of smooth roller testing where higher (than you’d use outdoors) is better, but I do understand that it is at odds with what we’re suggesting. We do a lot of outdoor testing and the online calculator is a result of a lot of Crr calcs and modelling from specific test sessions as well as races, over a wide range of rider weights.

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

When you order a set wheels and include the tubeless tires option are they mounted or provided as a kit

Thanks

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Follow my project on Project 100 miles / 4 hours

If you want them mounted we can do that for free, just make sure you put a comment in the comments box at checkout :)

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

Thanks for the answer.

The wheel bags are only included when I add tires. Do u have a delivery date for now placed orders for Zephyr disc wheel combo and disc brake? (I waited a while and hoped they where on stock but still not on stock)

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Follow my project on Project 100 miles / 4 hours

Best not to wait for stock for the foreseeable future as the demand is really high so I can't see us holding stock for a while! ZEPHYR + Disc in disc brake, I would expect they would ship end of October if ordered now.

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

Thanks, I send you a pm with some questions

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Follow my project on Project 100 miles / 4 hours

Hi

There are something you should take in consideration. Even though you order a disc for a Speed Concept it would not fit right out of the box.

I had to modify the break pads, the Durotrap cover and remove the rubber grommets to make it fit. That gave 5-7 mm. clearance between the side of the disc and the frame.

I could not use the wheel even though, because it is so flexible that it rubs against the frame. The wheels are apparently not checked for flex before send to the customer. So you will also have to check it yourself.

So you have a new disk wheel and you can't use it?

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Follow my project on Project 100 miles / 4 hours

Yes I bought a new disc fitted for a Speed Concept, witch I bought to Ironman Barcelona. But I could not use it because it rubs against the frame at 150 watt or so. I didn’t think I had to check for that much flex in the disc.

I hope mine would not have that much flex (orderd a disc with a frontwheel combo) disc brake edition

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Follow my project on Project 100 miles / 4 hours

So has anyone that ordered Titan or Zephyrs actually received them yet? The last update I got was shipping of the first July order batch was trending to Oct 21.

I am waiting for my set a disc and a zephyr disc brake version. I was told shipping October but delayed to November

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Follow my project on Project 100 miles / 4 hours

I'm patiently waiting for a Titan front and Zephyr set. The Titan has missed two key TTs for me now, and now I'm into the off season. Oh well...