Zipp SL-70 Aero

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Monza36
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by Monza36

The latest Zipp SL-70 Aero... (no more Vuka sprint)

Image

Image

The bar’s distinctive wing-shaped top designed using Computational Fluid Dynamics (CFD), the same software used to design Zipp Firecrest wheels. And the difference of that design is real. A traditional round-tube section creates drag of about 0.74 Newtons, which we found requires about 7.5 watts of effort at 30mph (48.3kph) to overcome. The airfoil developed in CFD that is used in the SL-70 Aero handlebar creates just 0.11N of drag, which means a savings of 6.4 watts over a round-tube section

weight? 240gr

Retail Availability: March 2014
MSRP: $350, €300
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ajh
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by ajh

Pretty much a vuka sprint which I used for two years

Very aero, not uci, legal, when you hit the back of the bar when sprinting in the drops you bruise and Charlie horse your forearm, they are not that light and not that stiff.

deek
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by deek

On another forum a Zipp employee said these bars are much more friendly when sprinting and also have much better cable routing.

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Monza36
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by Monza36

ajh wrote:Pretty much a vuka sprint which I used for two years

Very aero, not uci, legal, when you hit the back of the bar when sprinting in the drops you bruise and Charlie horse your forearm, they are not that light and not that stiff.


still using the vuka sprint... no issues at all... even when sprinting....;-)
"Racing is life. Anything before or after is just waiting."
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HillRPete
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by HillRPete

Monza36 wrote:The airfoil developed in CFD that is used in the SL-70 Aero handlebar creates just 0.11N of drag, which means a savings of 6.4 watts over a round-tube section

Wondering about the test protocol. Just the bars, bars with bike, or complete setup with dummy.

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Monza36
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by Monza36

ajh wrote:Pretty much a vuka sprint which I used for two years

Very aero, not uci, legal, when you hit the back of the bar when sprinting in the drops you bruise and Charlie horse your forearm, they are not that light and not that stiff.


well, actually it is uci legal

Notes:
Features Zipp’s Rapid Routing™ system,
first developed for the Vuka Stealth integrated aero system, f
or easy internal cable routing.
UCI legal.
Compatible with all mechanical brake/gear systems and all electronic gear systems. Not clip compatible.
"Racing is life. Anything before or after is just waiting."
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ergott
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by ergott

wassertreter wrote:Wondering about the test protocol. Just the bars, bars with bike, or complete setup with dummy.



Handlebars hit clean air so I think it doesn't matter.

gabrielraff
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by gabrielraff

Hello to everyone, can someone explain to me if there´s any difference between Zipp´s Sl 145 stem to the Sl sprint and also between Vuka sprint bar and the Sl-70 aero? thanks

dmoneysworks
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by dmoneysworks

Anyone got real life photo's of the forementioned bar?

tinozee
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by tinozee

Looks like they left enough room for an out front mount.

Succisa75
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by Succisa75

dmoneysworks wrote:Anyone got real life photo's of the forementioned bar?

Here is a pic of mine with the SL sprint stem. I needed a compact bar for a better fit and these fit the bill beautifully. Image

Succisa75
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by Succisa75

Performance wise, I have no issues with them. I noticed more of a difference with the SL Sprint stem to be honest. I'm coming from a Storck cockpit by the way. The stem really helps improve your control of the bike, especially at high speeds. Price wise it's not cheap but discounts can be had out there especially from a good LBS.

*if you have an Aero bike or near aero like mine (Aernario) it really adds to the overall aesthetics.

dunbar42
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by dunbar42

HillRPete wrote:
Monza36 wrote:Wondering about the test protocol. Just the bars, bars with bike, or complete setup with dummy.


I'm thinking aero bars test well on a bike w/o rider but I'm wondering if that all vanishes with the rider onboard? As far as frontal area the rider's legs end up right behind the bars so I'm thinking there's no practical difference in terms of total drag. Sort of like how Specialized found no difference in drag with and without a beard in the wind tunnel.

Image

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Waldo
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by Waldo

They test quite well with a rider.
ENVE contract engineer | Former Zipp test engineer

dunbar42
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by dunbar42

Waldo wrote:They test quite well with a rider.


It would be nice to see that data (and to quantify "quite well.") The marketing claims are 6w at 30mph with no link to test data or methodology. As mentioned, this is one of those instances where testing a bike w/o a rider might exaggerate the aero benefits.

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