The 3M electrical tape is for taping down the OUTSIDE EDGE to the rim, not for applying tape to the inside to draw the cover into the spokes. For that, I'll typically use either clear packing tape, or even just duct tape...whatever is handy at the moment.

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http://bikeblather.blogspot.com/

spoked wheels = way better than honeycomb wheels

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36 kona qualifiers 2006-'23 - 3 Kona Podiums - 4 OA IM AG wins - 5 IM AG wins - 18 70.3 AG wins
I ka nana no a 'ike -- by observing, one learns | Kulia i ka nu'u -- strive for excellence
Garmin Glycogen Use App | Garmin Fat Use App

Oh brilliant! Thanks!

Someone obviously forgot to add the "ghettoness" factor into the wheel covers and the "cool" factor into the discs....when you do that, everything gets corrected ; )

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I'm faster in Kilometers!
Wattie Ink Triathlon Team
Powered by Accelerate 3

I don't care about their ghettoness. I still got a cover this morning actually.

Why would you want to sell the sub 9, it appears to test better that anything at yaw angles you are most likely to encounter.

Styrrell

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Styrrell

When you're not fast like me, all you have is the bling in transition to get the chicks....


Then again, I don't know a single chick that knows the difference,.,...but whatever....I'm still running a disc!

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I'm faster in Kilometers!
Wattie Ink Triathlon Team
Powered by Accelerate 3

Except the HED wheels. The zipp data seems to align with the data HED has on their website so if you assume their data is true they still blow all these wheels awway.

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Ride Scoozy Electric Bicycles
http://www.RideScoozy.com

Yes, it's a sail effect.

As has been mentioned here before by others, the confusion with standard aerodynamic lift and drag is that the coefficient of drag that is being discussed is CxA, not CdA. CxA is the body coefficient of drag, aligned with the axis of the bike rather than the direction of the wind. As such, CxA is a combination of classical aero lift and drag coefficients.

CxA(yaw) = CDA cos(yaw) - CLA sin(yaw),

where CDA is the classical drag coeff * area
CLA is the classical lift coeff * area

Some airfoils have lift-to-drag ratios of more than 10, so it's easy to see how a lucky, steady breeze might sometimes help you out. (A Northern Flying Squirrel has a lift-to-drag ratio of 1.98, by the way. In case you need to use one on your bike. :-) )


Coaching RAAM last summer, there was a stretch in Kansas where we got to see Tony O'Keefe pull some fantastic speeds with a disk wheel in a steady 20-degree wind. I still have the RAAM power files somewhere where this happened, I think.

What the curves are showing you is that under very special conditions (that you can't really count on), disk wheels can do really crazy stuff to your speed.

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AndyF
bike geek

but in some cases ghetto > cool...so confused

damn, hit reply instead of quote. I lose at the internet.

Would be curious to see the data for 22MPH and 25 MPH... 'cause last time i checked 30mph avg is a lofty target for most of us over any distance.

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Team Zoot

They're also doing free shipping on the wheel covers during May.

May is wheel month here on ST.

Just multiply by 0.394 and 0.579, respectively (assuming the v^3 scaling holds).

Asad

A lot of the data that's available is at 30mph, because that's the lowest speed that many wind tunnels run at.

http://forum.slowtwitch.com/...post=2143490#2143490

Taping the inside? Now I better do a full search on that. Wish I had read that before painstakingly doing the electrical tape on the outside!

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Aaron Bales
Lansing Triathlon Team

Ahem...actually, that plot is of drag force, not power, which scales with V^2.

The factors to multiply by are .538 and .694.

Even so, I'm not sure how useful the drag force values are to most folks, even if you scale them to different speeds. If you want to know what those drag plots "mean" in regards to your riding, then just follow the "rule of thumb":

0.1 lbs of drag @ 30 mph ~= 45g of drag at 30mph ~= 5W of power (at typical bike speeds) ~=.005 m^2 of CdA ~= 0.5 seconds/km

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http://bikeblather.blogspot.com/

all i have to say my powertap + dt swiss 585 + disc cover purchase just gets better and better.

where do you see that? is there a coupon code?

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Want: 58cm Cervelo Soloist. PM me if you have one to sell

Vintage Cervelo: A Resource

Does that require a coupon code? I didn't see it advertised on their site.
Thinking of getting one, currently race on an H3 so not sure the benefit is much.
Free shipping tho..

Doh, go up to my link ---- like the 5th post from the top

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Want: 58cm Cervelo Soloist. PM me if you have one to sell

Vintage Cervelo: A Resource

In the summer being heated up inside a black box how long do you think that electrical tape is actually going to stay taped ? It has to reach 110+ inside the wheel cover during the summer and that is probably a low estimate. Plus with the force the guys on ST put on that rear wheel just the sheer friction should heat it up enough to melt ;0)

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__________________________________________________
Official Polar Ambassador
http://www.google.com/...P7RiWyEVwpunlsc2JtQQ

hi greg, the shape of the curves remains the same at all normal human speeds, 30mph is a standard that is more repeatable and can discern smaller differences, but testing at 20mph doesn't change the order. this has been checked.

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

wife just crushed a local course TT record today with a Jet9 powertap and wheelbuilder cover taped on.

and it was REALLY windy out.

26.6mph on 242 watts for 8 miles

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

better be careful, she's going to be tested soon, that's fast

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Want: 58cm Cervelo Soloist. PM me if you have one to sell

Vintage Cervelo: A Resource