Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Mon Dec 18, 2017 12:31 am

All times are UTC+01:00





Post new topic  Reply to topic  [ 41 posts ]  Go to page Previous 1 2 3 Next
Author Message
PostPosted: Thu Jan 05, 2017 7:05 pm 
Offline

Joined: Wed Jan 27, 2016 1:39 pm
Posts: 678
kgt wrote:
So Cervelo's claim is scientificaly proved BS. Good.


yes and no... I'm not an aero expert, but I do a fair bit of TT racing, so I pay attention to the aero tests and from what I gather, anything out front, in the wind, in clean air, has a pretty dramatic effect, while stuff toward the back of the bike doesn't seem to be as important because the air is already seeing a lot of turbulence. Here's how I analyze their claim.... let's assume a standard baseline bike, a general, all-around climbing bike, maybe an R5 with a standard round bar. Then, Cervelo designs the S5 with their handlebar/stem combo and that set up improves the aero over the baseline by 3%, putting the Garmin on stem (because an out front doesn't quite work) doesn't negate that 3%, maybe it only knocks it down to 1.5%. So the bar stem combo still puts you ahead in the aero game even if you do have to mount the Garmin on stem.

mortirolo wrote:
Specialized used 17 degree stem in test, I think.


Yes, the bike being used is Cam Piper's personal bike and it appears as if he's using a -17* Zipp Service Course SL. Specialized has stated in numerous materials and aero reports that a -17* stem is the most aero because it puts the entire length of the stem behind the faceplate, shielding it from the wind.... its because of this, that they came up with the rider handlebars for the Venge Vias, allowing for riders to keep the same fitment with a -17* as they would with maybe a -12* or -6* stem and standard bars.

_________________
2016 Pactimo Brand Ambassador
http://www.Crankaddicts.cc
http://www.skratchlabs.com
2015 Specialized S-Works Allez
2015 Specialized Venge Pro


Top
   
Posted: Thu Jan 05, 2017 7:05 pm 


Top
   
 
PostPosted: Thu Jan 05, 2017 7:51 pm 
Offline

Joined: Fri Jun 03, 2016 5:08 pm
Posts: 974
@ryanw what about taking this ENVE mount and mounting it to the bottom two faceplate bolts. Seems there's decent clearance under the Cervelo bar..

Edit: nvm! Wouldn't be long enough on second thoughts. Need something similar, but longer..


Top
   
PostPosted: Thu Jan 05, 2017 9:28 pm 
Offline

Joined: Sat Apr 16, 2016 6:52 pm
Posts: 308
Location: London
Shrike wrote:
@ryanw what about taking this ENVE mount and mounting it to the bottom two faceplate bolts. Seems there's decent clearance under the Cervelo bar..

Edit: nvm! Wouldn't be long enough on second thoughts. Need something similar, but longer..


I'm pretty certain you could mount it on the top stem bolts and it would be fine?

_________________
'16 Cervelo S5 - 6900g
'17 Focus Mares Force 1
'15 Scott Addict Team - 6850g Sold
'17 Cervelo R3D DA - 7580g - Sold
'16 Cannondale CAAD12 DA Disc - 7560g - RIP


Top
   
PostPosted: Thu Jan 05, 2017 9:48 pm 
Offline

Joined: Fri Jun 03, 2016 5:08 pm
Posts: 974
Hmm.. not sure. Maybe work. But would still be sticking up in the air, not really level with the bars which is what i'm gunning for ultimately if spending 40quid on a bit of plastic/metal :P


Top
   
PostPosted: Thu Jan 05, 2017 10:29 pm 
Offline

Joined: Fri Jun 25, 2004 8:32 pm
Posts: 1386
Location: the Netherlands
Does anyone take cervelo statements serious? Soon they will claim that they apply crap paintjobs since loosing paint will result is a lighter and faster bike. Recently see more than a few not too old high end bikes that had large areas without any paint due to bad prepwork


Top
   
PostPosted: Thu Jan 05, 2017 11:00 pm 
Offline

Joined: Tue May 23, 2006 9:39 pm
Posts: 1064
Stolichnaya wrote:
Not sure about the aerodynamics, but out front is easier to read when going fast and arguably safer; that counts for something.


yeah...and testing in wind tunnel doesn't matter where its located.

_________________
- AX Lightness Vial EVO D + DA9070 + Enve SES 3.4 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9070 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + Campy SR11 + Enve 3.4 CK hubs


Top
   
PostPosted: Thu Jan 05, 2017 11:37 pm 
Offline
User avatar

Joined: Mon Mar 18, 2013 3:45 am
Posts: 349
There is a decent looking out front mount specifically for the Cervelo Aero Bars made by Rec-Mount. Could be a good option as you can add light and camera mounts underneath as well. Plenty of accessories options.

Image


Top
   
PostPosted: Thu Jan 05, 2017 11:46 pm 
Offline

Joined: Sat Apr 16, 2016 6:52 pm
Posts: 308
Location: London
That looks hideous IMHO.... Think swapping out for an Enve cockpit is the tidiest solution.

_________________
'16 Cervelo S5 - 6900g
'17 Focus Mares Force 1
'15 Scott Addict Team - 6850g Sold
'17 Cervelo R3D DA - 7580g - Sold
'16 Cannondale CAAD12 DA Disc - 7560g - RIP


Top
   
PostPosted: Thu Jan 05, 2017 11:55 pm 
Offline
User avatar

Joined: Mon Oct 24, 2016 10:08 am
Posts: 31
CrankAddictsRich wrote:
kgt wrote:
So Cervelo's claim is scientificaly proved BS. Good.


yes and no... I'm not an aero expert, but I do a fair bit of TT racing, so I pay attention to the aero tests and from what I gather, anything out front, in the wind, in clean air, has a pretty dramatic effect, while stuff toward the back of the bike doesn't seem to be as important because the air is already seeing a lot of turbulence. Here's how I analyze their claim.... let's assume a standard baseline bike, a general, all-around climbing bike, maybe an R5 with a standard round bar. Then, Cervelo designs the S5 with their handlebar/stem combo and that set up improves the aero over the baseline by 3%, putting the Garmin on stem (because an out front doesn't quite work) doesn't negate that 3%, maybe it only knocks it down to 1.5%. So the bar stem combo still puts you ahead in the aero game even if you do have to mount the Garmin on stem.

mortirolo wrote:
Specialized used 17 degree stem in test, I think.


Yes, the bike being used is Cam Piper's personal bike and it appears as if he's using a -17* Zipp Service Course SL. Specialized has stated in numerous materials and aero reports that a -17* stem is the most aero because it puts the entire length of the stem behind the faceplate, shielding it from the wind.... its because of this, that they came up with the rider handlebars for the Venge Vias, allowing for riders to keep the same fitment with a -17* as they would with maybe a -12* or -6* stem and standard bars.


More than 90% stem is 6*, I think, so the specialized test is just barely relevant. They made a test for almost nothing.

_________________
Marco Pantani - Momenti Di Gloria


Top
   
PostPosted: Fri Jan 06, 2017 10:42 pm 
Offline
User avatar

Joined: Sat Jan 04, 2014 5:17 pm
Posts: 47
You could always throw the Garmin in your bib pockets and use the Garmin Varia vision to display the content as a heads up display. Might be more Aero...


Sent from my iPad using Tapatalk


Top
   
PostPosted: Sat Jan 07, 2017 3:25 am 
Offline

Joined: Fri Feb 17, 2006 6:22 am
Posts: 1771
Location: Zion
Stolichnaya wrote:
Not sure about the aerodynamics, but out front is easier to read when going fast and arguably safer; that counts for something.


So much truth here. I'm not going back to stem-mounted computers.

_________________
5.7kg / 12.7lbs Addict SL w/PowerTap
9.3kg / 20.5lbs Scale 29 Pro ... woefully under-used
Retired: 5.9kg / 13lbs Addict R1 w/PowerTap ... lowest was 5.593kg / 12.33lbs


Top
   
PostPosted: Sat Jan 07, 2017 7:03 am 
Offline

Joined: Sat Apr 18, 2009 8:59 am
Posts: 1010
Location: Surrey UK
Barfly just added Cervelo mount to their shop.

_________________
Cervelo S5
Cervelo R5 VWD 5637g/12.43lb
Pronghorn XC SW Race 8284g/18.26lb


Top
   
PostPosted: Sat Jan 07, 2017 10:34 am 
Offline

Joined: Tue Nov 15, 2016 8:13 am
Posts: 94
I don't think there will be much in it. Out in front would have a higher overall Cd but the cross sectional area would be smaller.

On top, the Cd would be lower but a slightly larger cross sectional area.

_________________
Hambini
The science behind Aero Road wheels!!
Ceramic v Steel Bearings: The Truth
Visit the Hambini Website


Top
   
PostPosted: Sat Jan 07, 2017 2:14 pm 
Offline

Joined: Wed Jan 27, 2016 1:39 pm
Posts: 678
1415chris wrote:
Barfly just added Cervelo mount to their shop.


here's the link.

http://www.barflybike.com/shop/bar-fly-4-cervelo-mount-includes-gopro-and-light-mounts/

Looks pretty good to me.

_________________
2016 Pactimo Brand Ambassador
http://www.Crankaddicts.cc
http://www.skratchlabs.com
2015 Specialized S-Works Allez
2015 Specialized Venge Pro


Top
   
Posted: Sat Jan 07, 2017 2:14 pm 


Top
   
 
PostPosted: Sat Jan 07, 2017 2:18 pm 
Offline

Joined: Wed Jan 27, 2016 1:39 pm
Posts: 678
ryanw wrote:
That looks hideous IMHO.... Think swapping out for an Enve cockpit is the tidiest solution.


I think the Fizik Stem and Barfly/Fizik mount look better than the Enve set up and there are a lot of complaints about the enve mount losing computers.

http://www.crankaddicts.cc/fizik-cyrano-stem-barfly-2-0-direct-stem-mount/

Image

Image

Image

_________________
2016 Pactimo Brand Ambassador
http://www.Crankaddicts.cc
http://www.skratchlabs.com
2015 Specialized S-Works Allez
2015 Specialized Venge Pro


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 41 posts ]  Go to page Previous 1 2 3 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Aero Stem for Sram Blip box

in Road

Epsom

1

250

Sun Nov 19, 2017 4:32 pm

trimenc View the latest post

There are no new unread posts for this topic. Clip-On Aero Bars for Stem

[ Go to page: 1 2 ]

in Road

mrtkcmz

16

645

Mon Nov 13, 2017 7:26 pm

addictR1 View the latest post

There are no new unread posts for this topic. AERO handlebar for MCFK stem and clip-one bar

in Road

mortirolo

2

1032

Sun Oct 22, 2017 6:34 pm

mrtkcmz View the latest post

There are no new unread posts for this topic. Most Tiger Aero stem VS Pinarello Dogma 65.1

in Road

Dakingrocco

2

786

Mon Jan 09, 2017 10:03 am

Dakingrocco View the latest post

There are no new unread posts for this topic. Upgrading my Front end ( Handlebar, stem , expander

in Road

jobvisser

3

830

Sat May 27, 2017 12:16 pm

r33prman View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: apctjb, beanbiken, donald, Flrider, KarlC, vanillaflyweight and 47 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited