Bora 50 aero data

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richscott
Posts: 24
Joined: Mon Nov 16, 2015 5:31 am

by richscott

Hi there - is there any aero data available which compares bora 50's to enve/zipp


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theDmitry
Posts: 5
Joined: Wed Jun 20, 2018 10:10 am

by theDmitry

there is 2016 TOUR test with
Campagnolo Bora One 50
Zipp 404 Firecrest
Zipp 303 Firecrest

here are public results:
https://www.tour-magazin.de/komponenten ... 41647.html


they also have private paper with more detailed review:
https://imgur.com/a/gi83sCg
https://imgur.com/a/PFrCDyY
https://imgur.com/a/htQv4vc

and test with ENVE wheels
https://www.tour-magazin.de/komponenten ... 45092.html

by Weenie


Renault78law
Posts: 2
Joined: Fri Aug 24, 2018 6:56 pm

by Renault78law

I'm really surprised this hasn't been discussed yet considering how many on this forum run Boras (just purchased a pair myself). A very interesting study entitled, Racing Wheels’ Effect on Drag/Side Forces Acting on a Cyclist at Sportstech-Miun Wind Tunnel. The compared 50mm Bora Ones and 40mm Vision Metron 40 LTDs.

http://www.mdpi.com/2504-3900/2/6/210
file://calax02/24165/UserProfile/Downloads/proceedings-02-00210-v2.pdf

robertbb
Posts: 549
Joined: Thu Jul 23, 2009 3:35 am
Location: Melbourne, Australia

by robertbb

Renault78law wrote: ↑
Fri Aug 24, 2018 9:46 pm
I'm really surprised this hasn't been discussed yet considering how many on this forum run Boras (just purchased a pair myself). A very interesting study entitled, Racing Wheels’ Effect on Drag/Side Forces Acting on a Cyclist at Sportstech-Miun Wind Tunnel. The compared 50mm Bora Ones and 40mm Vision Metron 40 LTDs.

http://www.mdpi.com/2504-3900/2/6/210
file://calax02/24165/UserProfile/Downloads/proceedings-02-00210-v2.pdf
The meat and potatoes of the above:

Considering the wind speed referred to the ground VWG of 20 km/h (Figure 5e), the Vision wheelset
shows the smallest CDA and the Bontrager the highest both at small and high yaw angles. At a yaw
angle of 0°, the Vision wheels have 4% and 14% less drag than the Campagnolo and Bontrager wheels,
respectively. For medium yaw angles (10–15°) the Campagnolo wheelset shows the best behaviour:
at 15°, it has 2% and 6% less drag than Vision and Bontrager wheelsets, respectively. At the highest
yaw angle, the Vision wheelset has 14% and 12% less drag than Bontrager and Campagnolo wheels.

TL;DR - the Visions are better at low and high yaw angles. The Boras are better at medium yaw angles, but not by much at all.
It's ALL about the bike.

RobertBB's CyclePlanner Spreadsheet:
https://weightweenies.starbike.com/foru ... 8&t=152263

Renault78law
Posts: 2
Joined: Fri Aug 24, 2018 6:56 pm

by Renault78law

I just bought a set of Boras but was realistic about expectations. Nobody claims Boras are the fastest wheels out there, aero-wise. The Boras' shape has been refined a little, and made a little wider, but there are more modern shapes out there developed using advanced CFD and extensive windtunnel testing. It's no wonder that the Boras are not popular among the aero-weenie crowd. However, the Boras seem to be an all-around great wheel. I have not yet ridden them, but I chose them because they're beautiful, brake well, have great hubs, stiff, priced well, and generally bombproof. The aero differences between wheels of a given depth aren't so great as to make any difference to me. I prioritize the look and reliability.

by Weenie


pdlpsher1
Posts: 1717
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

I bought my Boras after reading Tour's wheel test report. I love them and they are plenty aero for me. I own both the 50's and 35's. 35's for winter riding when the wind is the strongest.

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