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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 07-01-11, 11:12 PM   #1
RenzSouljohnson
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Aerospoke style front wheel...

I've seen a man with a bianchi pista riding around the lake and I couldnt help but notice his kickass front wheel.

I wasn't sure what it was. It was the same 5 star style of an Aerospoke, but it definitely was NOT a regular one.

So my question is, perhaps one of you has seen one before and can tell me the name of it because it just looked so damn good.
A description for each spoke is that they are a bit thinner and slightly tapers when they reach the perimeter of the wheel.

edit -


Last edited by RenzSouljohnson; 07-02-11 at 12:00 AM.
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Old 07-01-11, 11:23 PM   #2
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Old 07-01-11, 11:29 PM   #3
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http://www.seekpart.com/company/4455...151651890.html

edit:

lol @ those guys talking about aero then wearing normal helmets and no shoe covers.
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Old 07-01-11, 11:50 PM   #4
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^^

nope, the spokes were about twice as thin.
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Old 07-01-11, 11:59 PM   #5
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heres a sketch of the wheel. It was kind of like a star and im pretty sure had some chrome in the center of each spoke or something similar.

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Old 07-02-11, 12:00 AM   #6
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Was the front wheel smaller than the rear wheel?
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Old 07-02-11, 12:02 AM   #7
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Mavic also makes a 5 spoke wheel, but it doesn't exactly fit your description.

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Old 07-02-11, 12:03 AM   #8
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@ Hamish, nope the wheels were identical

id say theyre at least 30 percent thinner than regular aerospoke wheels
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Old 07-02-11, 12:12 AM   #9
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I'm stumped. Maybe they were 26" mag wheels.
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Old 07-02-11, 12:14 AM   #10
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Looove that video. It's amazing how little aerodynamic changes make a difference. (I'm majoring in Aerospace Engineering...)
Also the explanation of the hand sticking out of the window... Not completely wrong but there is more to it, like high/low pressure zones.
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Old 07-02-11, 12:18 AM   #11
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(I'm majoring in Aerospace Engineering...)
Would you mind if explaining if that video makes sense at all or just marketing stuff?

I know it didn't show any hard number...but what do you think about the video's credibility. I'd assume that it is slightly biased since it is conducted by Cervelo themselves.
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Old 07-02-11, 12:29 AM   #12
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when I see that guy next time, I'll have to ask him because I've never seen it anywhere else.
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Old 07-02-11, 12:47 AM   #13
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Well of course it's incredibly biased. It is marketing after all.
I do know that the bicycling community shells out for aerodynamic research, so it must be doing something for them.

Credibility-wise, you're right. There are no hard numbers or (as I understand) industry aero test standards so it is hard to compare to other bikes. Aerodynamics is based on cross-sectional area (perpendicular to travel), so rider size has a lot to do with the drag (why they were using the dummy/consistency).
Cervelo is regarded as a "winning brand", and I think their research has a lot to do with that.

Now that I wrote all of that and THEN looked on their website, they actually do have a couple good presentations on aerodynamics and other engineering topics:
http://www.cervelo.com/en_us/enginee...presentations/

It's remarkable for the amount of time we have known aerodynamics that we still don't have a lock on the best designs.
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Old 07-02-11, 12:57 AM   #14
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Thanks for answering my questions, I really appreciate it.

As an aerospace engineering major, are you aero on your bike?
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Old 07-02-11, 01:11 AM   #15
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Sure thing.

Well it's not like I have exclusive access to a windtunnel.
I only go aero if I can feel the wind attacking me. I'm sure you know the feeling of getting down low and feeling less wind. That is reducing the cross-sectional area I was talking about.
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Old 07-02-11, 02:08 AM   #16
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Old 07-02-11, 02:12 AM   #17
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Old 07-02-11, 04:41 AM   #18
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Whaaaaaaaat?

http://www.ridelust.com/wp-content/u...-1-500x304.jpg
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Old 07-02-11, 04:45 AM   #19
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ah the dildo5000
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Old 07-02-11, 11:58 AM   #20
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nope. The outer rim is thinner and so are the spokes even.

and Leuky bear, the design of the spokes are more similar to the picture above, except more slender in all aspects with some chrome trim through the center of each spoke.
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Old 07-02-11, 12:07 PM   #21
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Ah here's a picture that looks almost like the wheel im talking about except this one has 4 spokes the one i saw has 5

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Old 07-02-11, 05:38 PM   #22
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http://vancouver.en.craigslist.ca/va...437812983.html



Spinergy 5 carbon spoke wheel. 26". Includes tire.
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Old 07-02-11, 05:52 PM   #23
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Skyway Tuffs?

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Old 07-02-11, 07:44 PM   #24
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^what i was thinking. iirc the skyways came in 26"?
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Old 07-02-11, 08:50 PM   #25
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Quote:
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lol @ those guys talking about aero then wearing normal helmets and no shoe covers.
Lol at you not knowing what you are talking about.

Aero helmets are not legal in road races. Only time trials...but the bike in the video is not a time trial bike. Shoe covers are rarely used in road races...and especially not in the summer heat. They also prevent the riders from adjusting the tightness of their straps as their feet swell during racing.
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