Weight Weenies

I have the option to choose between an
Standard bar and a aero bar. Can anyone share with me any diff? Aero bar is a bit heavier. I
Have to seriously consider a bar for my new bike and 1st time to road.

And I have the option between

1) ritchey super logic 2 - standard
2) Easton ec90SLX3 standard and aero
3) 3t - one of the lightest but can remember which model.


Any advise.

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assuming you are talking about standard drop bars with an aero profile, rather than full-on aero bars, in a review that zipp references on its website it says c. 5w saving with vukasprint bars

for wheels, zipp usually quotes based on riding at 300w at 48km/hr

presumably the 5w came from zipp and is based on a similar screnario, so if you ride fast for a long time, there'll be some benefit, but it's not huge

the blurb for easton aero ones seems to say the aero benefit comes from changed rider position, i can't see the bars themselves beating the zipp ones for drag

fwiw after finding lighter bars/stem too flexy (deda newton bars, zero 100 stem), i accepted that i needed to go heavier if wanted stiff, experimented and in the end i got a cinelli ram2 integrated, the extra weight was well worth it, no flex at all

now some say the zero 100 is a stiff stem, but of course it depends on your weight, power, riding style etc., if you do put a lot of oomph through the bars on hard climbs or sprints then it's something to consider

worth learning about

And how I have the option to use deda 35mm

Please excuse my thread-jacking, but does anyone have some numbers for watt savings with dropbars and aero clip-ons/extensions vs actual flat TT bar, when riding in the same position on the extensions? Ie, how much will the un-used drops with STI's/brifters hold one back, compared to wing shaped TT basebar with just aero brake levers?

I genuinely think the fastest one is whichever is most comfortable for you. If the bar can keep you in a good position over the course of a ride, you'll almost certainly earn back that 5w savings.

If all are equal on comfort, then go for aero or lightest or stiffest as your priorities dictate.

clarkson wrote:I genuinely think the fastest one is whichever is most comfortable for you. If the bar can keep you in a good position over the course of a ride, you'll almost certainly earn back that 5w savings.

If all are equal on comfort, then go for aero or lightest or stiffest as your priorities dictate.

Best post ever on this forum...

i ended up with this stem and bar

mjduct wrote:

clarkson wrote:I genuinely think the fastest one is whichever is most comfortable for you. If the bar can keep you in a good position over the course of a ride, you'll almost certainly earn back that 5w savings.

If all are equal on comfort, then go for aero or lightest or stiffest as your priorities dictate.

Best post ever on this forum...

Nah...

This is.

DMF wrote:Please excuse my thread-jacking, but does anyone have some numbers for watt savings with dropbars and aero clip-ons/extensions vs actual flat TT bar, when riding in the same position on the extensions? Ie, how much will the un-used drops with STI's/brifters hold one back, compared to wing shaped TT basebar with just aero brake levers?

Numbers in the order of about 30-40w, depends how narrow you are and how good the aerobar is too! Its quite a lot of tubing/sti sticking out in the wind.

Holy cow! I would have figured it'd be closer to one third of that, tops.... The TT-bars are going on the roadbike ASAP. Rarely use the drops since I got the extensions anyway. Having to reach for the shifters when on the "hoods" seems very minor compared to 30+ watts when on the gas...

Are the Zipp data with or without a rider? Since rider is drafting behind bars seems it would make a big difference.

I don't understand those 35 mm bars unless you're a 100 kg sprinter or have very wide shoulders. A bit of bar flex acts as suspension. There can be too much, perhaps, but those seem way overkill.

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Machinenoise wrote:

DMF wrote:Please excuse my thread-jacking, but does anyone have some numbers for watt savings with dropbars and aero clip-ons/extensions vs actual flat TT bar, when riding in the same position on the extensions? Ie, how much will the un-used drops with STI's/brifters hold one back, compared to wing shaped TT basebar with just aero brake levers?

Numbers in the order of about 30-40w, depends how narrow you are and how good the aerobar is too! Its quite a lot of tubing/sti sticking out in the wind.

I can't believe the drops will generate 30-40W of drag ... e.g. 1/8th of the threshold power of a decent amateur ?

Machinenoise wrote:

DMF wrote:Please excuse my thread-jacking, but does anyone have some numbers for watt savings with dropbars and aero clip-ons/extensions vs actual flat TT bar, when riding in the same position on the extensions? Ie, how much will the un-used drops with STI's/brifters hold one back, compared to wing shaped TT basebar with just aero brake levers?

Numbers in the order of about 30-40w, depends how narrow you are and how good the aerobar is too! Its quite a lot of tubing/sti sticking out in the wind.

That sounds high to me. Of course it depends on speed.

For instance, going from a Specialized Tarmac with clipons on a handlebar to a Specialized Transition with a tt setup and otherwise the same variable you get a 20 watt advantage and that is divided up between the frameset, position and then the better aerobar:
http://www.bikeradar.com/gear/article/h ... ero-19273/

So maybe more like 5 watts at 25mph?

I never use the drops so I went this way.

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