*Tour Aero Bike Test 2019*

Discuss light weight issues concerning road bikes & parts.

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TobinHatesYou
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by TobinHatesYou

ryanw wrote:
Wed Dec 19, 2018 9:42 am

Are your eyes working today?

The bike was tested on 404s @ 206w. They tested it on the shallower DT Swiss wheels and it was 3w slower, 209w.

Reading the translation VTR1000SP2 posted, it says the SystemSix was at 206W with the DT Swiss and at 203W with the 404s.

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ryanw
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by ryanw

TobinHatesYou wrote:
Wed Dec 19, 2018 9:44 am
ryanw wrote:
Wed Dec 19, 2018 9:42 am

Are your eyes working today?

The bike was tested on 404s @ 206w. They tested it on the shallower DT Swiss wheels and it was 3w slower, 209w.

Reading the translation VTR1000SP2 posted, it says the SystemSix was at 206W with the DT Swiss and at 203W with the 404s.
He's quoting the S5's data... ETap S5 comes with DT Swiss ARC 1450 DiCut 48s. They are slower than 404s.
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TobinHatesYou
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by TobinHatesYou

ryanw wrote:
Wed Dec 19, 2018 9:59 am

He's quoting the S5's data... ETap S5 comes with DT Swiss ARC 1450 DiCut 48s. They are slower than 404s.

Yes and...

"Aero rating, the S5 occupies second place with 206 watts at 45km / h behind the SystemSix. Faster Zipp 404 instead of the standard DT wheels save another three watts. This gives the bike the aerodynamic level of SystemSix."

?????????????????????????

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ryanw
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by ryanw

I've turned 34 today, maybe my eyes aren't working, I apologise.

I'm now confused by the entire test. They quote all bikes were tested on Zipp 404s (as the 2016 was), yet they are quoting test results on OEM wheels?

Venge Disc CLX 64 64mm - 208w
Venge Disc Zipp 404 58mm - 206w

S5 Disc DT Swiss ARC 1450 48mm - 206w
S5 Disc Zipp 404 58mm - 203w
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SL7 S-Works - 6.73kg
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hambini
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by hambini

The wheels will have much more effect on the end result than the frame because

1. they are rotating
2. the aerodynammic discontinuity (the void) changes with the rim depth.

Can anyone actually do 45km/h with a power output of 205W or is the half dummy pointless.

Hambini
Hambini Aeronautical Engineer, Polluting YouTube since 2016 - views expressed are my own...

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VTR1000SP2
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by VTR1000SP2

hambini wrote:
Wed Dec 19, 2018 11:44 am

Can anyone actually do 45km/h with a power output of 205W or is the half dummy pointless.

Hambini
Even on Zwift, with a draft, it takes almost 240W to hold 45km/h.

Perhaps there is a native German speaker here that could translate this sentence or compare the Google translate results:

German - Schnellere Zipp 404 statt der serienmäßigen DT-Laufräder sparen noch mal drei Watt.
English - Faster Zipp 404 instead of the standard DT wheels save another three watts.

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VTR1000SP2
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by VTR1000SP2

ryanw wrote:
Wed Dec 19, 2018 10:24 am
I've turned 34 today, maybe my eyes aren't working.
Happy Birthday!

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ryanw
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by ryanw

hambini wrote:
Wed Dec 19, 2018 11:44 am
Can anyone actually do 45km/h with a power output of 205W or is the half dummy pointless.
I'm 85kg and on a 2'40" flat segemnt in Richmond Park, I averaged 44.5kph @ 401w with naff all wind.

EDIT: That's on my 2016 S5, Enve 4.5s with Vredestein latex tubes / 26c Spesh Turbo Cottons, Enve aero stem and bars. No cages in full aero tuck position.
Last edited by ryanw on Wed Dec 19, 2018 12:11 pm, edited 2 times in total.
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ryanw
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by ryanw

VTR1000SP2 wrote:
Wed Dec 19, 2018 11:57 am
ryanw wrote:
Wed Dec 19, 2018 10:24 am
I've turned 34 today, maybe my eyes aren't working.
Happy Birthday!
Cheers mate :thumbup:
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hambini
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by hambini

VTR1000SP2 wrote:
Wed Dec 19, 2018 11:54 am
hambini wrote:
Wed Dec 19, 2018 11:44 am

Can anyone actually do 45km/h with a power output of 205W or is the half dummy pointless.

Hambini
Even on Zwift, with a draft, it takes almost 240W to hold 45km/h.

Perhaps there is a native German speaker here that could translate this sentence or compare the Google translate results:

German - Schnellere Zipp 404 statt der serienmäßigen DT-Laufräder sparen noch mal drei Watt.
English - Faster Zipp 404 instead of the standard DT wheels save another three watts.
I'm by no means a native German speaker but that translation is correct to me.
Hambini Aeronautical Engineer, Polluting YouTube since 2016 - views expressed are my own...

hambini
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by hambini

ryanw wrote:
Wed Dec 19, 2018 12:07 pm
hambini wrote:
Wed Dec 19, 2018 11:44 am
Can anyone actually do 45km/h with a power output of 205W or is the half dummy pointless.
I'm 85kg and on a 2'40" flat segemnt in Richmond Park, I averaged 44.5kph @ 401w with naff all wind.

EDIT: That's on my 2016 S5, Enve 4.5s with Vredestein latex tubes / 26c Spesh Turbo Cottons, Enve aero stem and bars. No cages in full aero tuck position.
That's a lot more believable than 205W

From our wind tunnel testing, 200W was about 30km/h for the average punter.
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fa63
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by fa63

Same here; at 200W I am doing about 30 km/h (big rider, on the hoods, non-aero bike, shallow wheels), and to do 40 km/h takes about 400W. 45 km/h would probably be a 500W effort for me on a road bike, on the hoods...


TobinHatesYou
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by TobinHatesYou

135lbs/61kg
5’10”/178cm
Emonda SLR Disc H1 with round bars and Zipp 202s
Very aero position
60F/15.5C

Recent ride:
225W = between 21-22mph / 34-35kph
200W seems to drop me by 1mph / 1.5kph

I just plugged my numbers into bikecalculator.com and they were pretty close.

TiCass
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by TiCass

TobinHatesYou wrote:
Wed Dec 19, 2018 7:15 am
TiCass wrote:
Wed Dec 19, 2018 2:30 am

That makes much more sense now.
I wonder why they didn't used the S5 DI2 with Enve 5.6. Probably more aero.

I wouldn’t bet on the 5.6s being more aero than 404 FCs. Remember that 404s are 58mm deep while 5.6s are just 54/63mm deep. Front wheel depth has a much greater influence on aerodynamics than rear wheel depth.

The SystemSix with 23mm tires and 64mm rims definitely has the tire/wheel combination to win aero tests. Perhaps they have the best bar/stem solution too.
Probably more aero... than the DT Swiss ;) I think the idea to test bikes with OEM wheels is to find what is the fastest out of the box. In that regard, I would test the S5 Dura-Ace DI2 version with Enve 5.6. Not sure if it would be faster than the Cannondale SystemSix, but certainly closer. Bikes shipped with 64mm wheels certainly have an advantage in that test.

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dastott
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by dastott

No love for the Merida Reacto? Big company, designed in Germany, major World Tour sponsor, won Milan-San Remo...

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