Those changes are exactly what I recommended to Graham when I was in talks with him about his next design iteration. You've done a beautiful job. If you ever are thinking about upgrading to a Z1-Eleven, find me and I will take that beauty off your hands. Call it the XXX-C1.

Chris

Did you do all this changes yourself or you got Graeme to do them ?

Whats is aero crudentials ? CFD or tunnel ? If its neither, its too expensive compared to its competition.

Well, I guess that IMO this could be discussed since Pearson bikes are like "haute couture" (expensive but very exclusive) compared to "prêt à porter" (nice quality and cheaper but not that exclusive).

Not so fast, the fastest aero bike in the world was designed without either of those two credentials =)

One can go a long way by just "having a clue"

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

Calfee can get away with that. Pseudo aero bikes which might actually make you slower can't. Not at that price. Its not 1999 anymore - customer expectations are higher now.

Good point but who still makes lenticular discs these days? Mavic and who else?

lenticular disc - Certainly not an exhaustive list, just what I can think of on short notice.

Mavic Comete Disc - http://www.mavic.com/...n/wheels/Comete-Road
FFWD - http://www.ffwdwheels.com/.../wheels/tt-tri/disc/
Zipp 900 tubular - http://www.zipp.com/wheels/900-tubular/
Renn 555 (flat) - http://www.rennmultisport.com/~rennmem/store/commerce.cgi?product=555
Shimano Pro disc - http://www.jejamescycles.co.uk/...tubular-id43997.html

From what I can tell, only the Mavic and Zipp 900 are true lenticular shaped discs.

 

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Team Zoot-Texas, and Pickle Juice

I had thought of those changes in 2010 after racing IM Germany. I talked with Graeme about them, but I never followed through with it more than the idea stage.
At the beginning of this year, I once again consulted with Graeme about the changes I still wanted to do. Graeme and I agreed that it would be best if I did the modifications locally due to fitment and tolerances of the stem aerobar.
I worked with my paint and body guy locally who build surfboards, and he and I got it done.
I couldn't be happier with how it turned out. IMO, I think it helps to "smooth" out the frame's shape and profile.
I have the frame torn down now, and have put new white graphics on it. Just took my aerobar to the same painter today for clear coat, then will rebuild everything in time for IM NYC.
I will post some pics of just the frame showing the differences in last year and this year with modifications.
Thanks for the offer, but I don't know that I could ever let go of this frame. It will likely become a wall trophy when I stop racing.

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Team Zoot-Texas, and Pickle Juice

I talked with Nick by email about his brakes while they were still in pre-production. Unfortunately, I missed out on the pre-sale ordering for the brakes. So, I will have to wait. Plus, I want to hear how they perform from those who get the first sets.

Currently, I have Simkins Egg Brakes on front and rear, and I've been very happy with them. But, I'm always willing to look at and try new products.

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Team Zoot-Texas, and Pickle Juice

Bmanx, he´s already got a Simkins brake on the front by the look of things. Would the Omega be that much of an improvement? Or is it just aesthetically more pleasing?

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´Get the most aero and light bike you can get. With the aero advantage you can be saving minutes and with the weight advantage you can be saving seconds. In a race against the clock both matter.´

BMANX

I first talked with Graeme about them in 2010, but I never followed through with it more than the idea stage.
At the beginning of this year, I once again consulted with Graeme about the changes I still wanted to do. Graeme and I agreed that it would be best if I did the modifications locally due to fitment and tolerances of the stem aerobar.
I worked with my paint and body guy locally who builds surfboards, and he and I got it done.
I couldn't be happier with how it turned out. IMO, I think it helps to "smooth" out the frame's shape and profile.
I have the frame torn down now, and have put new white graphics on it.
I will post some pics of just the frame showing the differences in last year and this year with modifications.

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Team Zoot-Texas, and Pickle Juice

Thx

The proof is in the pudding they say so when I get mine, I will let you know how well they function. Aero is the other side of the story and I would venture a guess that when these brakes were tested they test right around the Hooker brakes but just a bit behind because the way the brake pad/holders are designed and then my gut tells me it is the Simkins brake a distant third. I am pretty sure that when Tom tested the Simkins brakes they were around the same or slightly better than the Tektro/TRP (with modified center pull) and I know how the Tektro/TRP faired in testing and that is why I sold them hours later.

Its not 1999 anymore -customer expectations are higher now.

I agree, but your use of Calfee bikes is an odd example. Calfee aero bikes always looked like really expensive Planet X clones and I never heard anybody test either type and say they were fast. I was never sure how Calfee sold any bikes at the price he charged when a P2 cost half as much and was proven aerodynamically, unless it was just the novelty value of having a different bike.

Talking about the OP bike now, I don't see how a serious consumer would pay that kind of money for an unproven design. Proven designs like the old P2C can be had now for silly-low prices. On the other hand, there is definately a component of the tri market for folks would put 'different' over performance, and some of them have a lot of money.

Chad

wheelbuilder cover?

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36 kona qualifiers 2006-'23 - 3 Kona Podiums - 4 OA IM AG wins - 5 IM AG wins - 18 70.3 AG wins
I ka nana no a 'ike -- by observing, one learns | Kulia i ka nu'u -- strive for excellence
Garmin Glycogen Use App | Garmin Fat Use App

The example of Calfee (or maybe Colnago is a better example) is that people buy those bikes for craftmanship, brand or style, not aero performance. The beam bike is touted as a performance item so it needs in the current market to have some crudentials - especially at that price.

"The proof is in the pudding they say"

Actually, they say, "The proof of the pudding is in the eating." Sorry, I haven't been a pompous jerk yet today, and it's almost time to go home . . .

In keeping with the theme (somewhat) of this thread, I really like this bike.

I thought the problem with beam bikes was that when your thighs come parallel with the beam as they do twice every pedal revolution that it creates an air dam since the wind can't pass between your legs as the hole is filled by the beam. I think this was found in the development of the Superbike as part of Project 96. Anyone have access to this data?

I don't have any data on the superbike project of '96. But, I'm confused about the air dam effect with the beam.... The beam, at least on my Pearson is at the same height level as that of a standard geometry frame. Thus, the top tube of standard frames would create the same air dam as the thighs move into parallel position. Maybe I'm not picturing the position and effect you mention correctly?? I'm curious about your thoughts on it, but I might need further clarification so I can visualize what you mean.

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Team Zoot-Texas, and Pickle Juice

A modest program of CFD analysis was carried out during the development of the Pearson Z1-11.
It may not have been the most sophisticated aero programme, but the CFD numbers for beam bikes have such a large advantage (particularly in high yaw angles) that you can afford to miss out on some of the more complicated aero tweaks. Here's some numbers for a prototype Pearson Z1, measured with and without P3 style UCI seat-post and stays
A couple of turbulence plots at 5 deg. yaw for comparison below:





For comparison, the difference between having aero wheels (disk rear and trispoke front) vs standard wheels (Ksyriums) is 5.5% at 0 deg yaw. At yaw angles of 5 deg, the disk is a disadvantage.

Graeme's new non-UCI legal canted fork also makes a 2.5% advantage, which is pretty impressive. He's been making beam bikes for quite a few years now, and he's got a huge amount of real-world data on what works.

" For comparison, the difference between having aero wheels (disk rear and trispoke front) vs standard wheels (Ksyriums) is 5.5% at 0 deg yaw. At yaw angles of 5 deg, the disk is a disadvantage. "

Are you saying that it is a disadvantage on this bike? It sure as heck isn't on any other bike I'm aware of. I've yet to see a single manufacturer or even independent test that showed a disc becoming a disadvantage with increasing yaws over a standard rim...I've seen plenty that showed the opposite though.

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-Andrew Saar
It is better to do the right thing and be paid poorly,
than to do the wrong thing and be rewarded richly.

very nice, i am a softride lover, (should have never sold my power wing), this is very nice, does it come with a cape?
nice eye candy