Zipp SL-70 Aero

Discuss light weight issues concerning road bikes & parts.
User avatar
Monza36
PowerMeister
Posts: 56
Joined: Tue Mar 11, 2014 12:00 pm

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
"Racing is life. Anything before or after is just waiting."
--Steve McQueen--

by Weenie


User avatar
ajh
Posts: 577
Joined: Sun Oct 24, 2004 1:41 am
Location: Toronto, Canada
Contact:

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
Posts: 406
Joined: Fri Aug 31, 2012 6:32 pm

by deek

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

User avatar
Monza36
PowerMeister
Posts: 56
Joined: Tue Mar 11, 2014 12:00 pm

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."
--Steve McQueen--

HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

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.

User avatar
Monza36
PowerMeister
Posts: 56
Joined: Tue Mar 11, 2014 12:00 pm

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."
--Steve McQueen--

User avatar
ergott
Posts: 2739
Joined: Tue Apr 18, 2006 3:03 am
Location: Islip, NY
Contact:

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
Posts: 1
Joined: Tue Jul 15, 2014 7:16 pm
Location: Buenos Aires, Argentina

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
Posts: 313
Joined: Tue Aug 07, 2012 6:35 am
Location: Parakai, New Zealand

by dmoneysworks

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

tinozee
Posts: 699
Joined: Wed Jun 01, 2011 7:53 am

by tinozee

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

Succisa75
Posts: 58
Joined: Sat Feb 22, 2014 6:06 pm

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
Posts: 58
Joined: Sat Feb 22, 2014 6:06 pm

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
Posts: 191
Joined: Tue Jan 07, 2014 9:20 am

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

User avatar
Waldo
in the industry
Posts: 340
Joined: Wed Oct 31, 2007 10:45 pm
Location: Indianapolis
Contact:

by Waldo

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

dunbar42
Posts: 191
Joined: Tue Jan 07, 2014 9:20 am

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.

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post