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Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 5:36 am
by virenque
With almost all highend wheelsets built with flat/bladed spokes, would using a round spoke like the dt revolution make a better handling wheel for crosswinds, like most new wheels that have wider/round profile

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 10:10 am
by jsinclair
No

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 10:10 am
by Weenie

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 10:21 am
by istigatrice
Nope, IDK about everyone else, but my bladed spokes make this "wooshing" sound when I am over 40kmph, does anyone else experience this?

Sorry if I am hijacking the thread :oops:

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 3:53 pm
by Spindoctor
wooshing is more likely to come from your tyres than the spokes - do 40 Kph would be nice - i'd put up with lots of noises at that speed.

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 4:18 pm
by Zen Cyclery
Maybe take a look at a spoke like the Cxrays from Sapim. They have an ovalized blade shape which makes them very aero with respectably high yaw angle tolerances.

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 7:29 pm
by sungod
this has some info on different spoke types and effect...

http://www.zipp.com/_media/pdfs/technol ... eshape.pdf

there's a slight increase in crosswind effect, but it's no big deal

the benefit of cx-ray vs. round spokes on aerodynamics far outweighs this

not sure about the whoosh, but they can certainly howl depending on yaw angle

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 8:22 pm
by HammerTime2
Zen Cyclery wrote:Maybe take a look at a spoke like the Cxrays from Sapim. They have an ovalized blade shape which makes them very aero with respectably high yaw angle tolerances.
Are they any different from DT Aerolites in that regard?

Re: Flat spokes vs round spokes

Posted: Tue Jul 24, 2012 9:04 pm
by Zen Cyclery
HammerTime2 wrote:Are they any different from DT Aerolites in that regard?


I think they would provide very similar advantages to the Cxrays. I don't have any paperwork though to show drag coefficient differences.

Re: Flat spokes vs round spokes

Posted: Wed Jul 25, 2012 2:00 am
by fdegrove
Hi,

HammerTime2 wrote:
Zen Cyclery wrote:Maybe take a look at a spoke like the Cxrays from Sapim. They have an ovalized blade shape which makes them very aero with respectably high yaw angle tolerances.
Are they any different from DT Aerolites in that regard?


They are the same shape. The only spoke (by Sapim) that does better as far as aero goes is a type that's made especially for FKC (Francois Kerautret). Unfortunately I do not have actual details, I'm just repeating what the French press is saying here.

There is however a new flat Superspoke (Sapim again) that is reportedly lighter and potentially even more aero due to less material etc.

http://www.rouesartisanales.com/article-53429708.html (Thanks to Adrien Gonthier for the scoop)

Ciao, ;)

Re: Flat spokes vs round spokes

Posted: Wed Jul 25, 2012 10:44 am
by kavitator
sapim cx ray are razor sharp, i love them. what about "fake" fat aero CN and others? easton ec 90 aero has strange sapim spokes..or are they SAP spokes? i think sapim lasers 1.5(1.4 after tension) are pretty aero

Re: Flat spokes vs round spokes

Posted: Wed Jul 25, 2012 3:06 pm
by LouisN
Not shure about this one, but my take is the wooshing sound comes from the rims, well, the rims serve as harmony tables that amplify the spokes vibrations in the wind, like a violin or guitar. That's why very thin walled, deep carbon rims seem to sound louder...

...Makes sense ?

Louis :)

Re: Flat spokes vs round spokes

Posted: Wed Jul 25, 2012 3:06 pm
by Weenie