Sweet! I go out for a ride and magic happens while I'm gone :-) Thanks for doing that.

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http://bikeblather.blogspot.com/

yeah, i know, i was running a rotundo before.

The difference is that reach on the aerotundo is measured from trailing edge to center, whereas on rotundo it's center to center.

btw, did you need to make any adjustments (stem length mainly) when making the swap? any difference in handling?

On that drawing above, it looks like it's from the center of the bar clamp to me (look for the small rounded edges top and bottom). It would be hard to go from the trailing edge since it's tapered in that plane.

I haven't made a swap since the bike isn't built yet...but, the geometry will be adjusted (front center, mainly) to accommodate both the bars and the particular stem selected (Omega X, which only comes in one length) to make sure that the drops end up where I like them relative to the saddle and BB.

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http://bikeblather.blogspot.com/

I think you mean Sigma X, which is our stem. Omega X is our brake :-)

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TriRig.com

You are correct. My mistake...that's what you get for naming things after Greek letters :-P

BTW, I just found out my build might get moved up...when are those Sigma X stems going to be available for purchase?

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http://bikeblather.blogspot.com/

I also need one to finish off my P2 build which as been on hold.

P2 aero road: long & low & narrow = aero

https://www.flickr.com/...ts/72157651118292023

Tom,
Can you talk more about why you chose the Aerotundo?
I know you said that you like a deeper drop.
Is the reach really as much as the diagram shows? Diagram shows it to be a good 3cm longer than other bars?
Are aerodynamics any different with 3T? Or are most of these top aero bars the same?

I don't have it in hand, so I don't have an actual measurement...but, I compared the reach and drop to the old 3T Prima 199 bars on my Bianchi (as installed), and it's similar.

One thing I've noticed about bars is that the aero road bars have basically one position they should be used in and the "tops" are mostly parallel to the ends of the "drops"...but with non-aero road bars, that's not usually the case. For example, that 3T Prima I have apparently has a reach measurement of about 100mm...BUT, that's when measured horizontally with the ends of the drops horizontal, which isn't how I set them up since that would place the tops at a significant down-angle. The way it's set up on my current bike, the reach measurement is closer to the AeroTundo measurement. I'm not sure why bar makers do that...

In any case, I also knew that I would be using a stem that's only 100mm, so I knew a slightly longer reach wouldn't be an issue since that's on the shorter end of "acceptable" for a road bike...not to mention the fact that the frame is going to be custom geometry and I can put the head tube wherever I want. The driver will be putting my hands in the right spot on the hoods and the drops relative to the seat and BB. Adjust top tube length to fit :-) All these short reach, short drop bars out there now is probably a big driver in folks using ultra long (>120mm) stems.

For the aero road bars....I'm pretty sure it's all about making that tops section non-round than anything else. Round sections horizontal to air flow have a lot of drag.

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http://bikeblather.blogspot.com/

I have the bontrager race lite aero. For the money ($89 retail), they are great. They aren't light, but I typically prefer aluminum bars because in my experience they take a crash better.

I like the bontrager bar because I can still add clipons for a TT if I need to, and I can easily run garmin and camera mounts off them.

The shape of the bend is going to be very independent. A lot of my teammates complain that while sprinting from the drops, they bruise their forearms on the tops. Most of that can be eliminated by technique, but it doesn't seem to be as big of a problem on bars with shorter reach. I did have to rotate these bars a little further forward, so the tops aren't exactly parallel with the ground. Not sure how much that impacts how aero they are.

Sorry for the late reply. Just put the new Cervelo bars on my TCR Advanced. I love them! But, I'm old and the compact bars work for me.

I looked for the old thread about these bars that Damon posted on last fall. He mentioned that the bars tested faster with the Garmin on the stem and not out front. Couldn't get the rubber bands around my Giant (literally!) stem, so while I'm waiting for the K-Edge that mounts to the steerer tube, I'm using the rubber band mount on the front edge of the bars. Looks a little funny since the Garmin points down a bit...