I'm sure Herbert will have pictures tomorrow, but no it's not the side wall. From what I can tell, only a sliver of color will be visible once the tire is mounted.

I couldn't find it on the English site, but here's pics of the new tire:

http://www.conti-online.com/...eifen/gp4000SII.html

yah, colours ftw!

Holy cow, yellow to go with my club kit. It's like they peered into my psyche and found the blind spot in my tri gear purchasing logic. I want coloured Contis!!!

looks like that colored strip will help with aerodynamics. form and function!!!! nice

What is with the gold/copper one? Different material on the inside?

CB

2014 conti road tyres:
http://www.conti-online.com/..._en/themes/News2014/
clicking on the links on their website is giving me errors though

Looks like the overall shape and tread pattern, smartly, has remained the same so aerodynamics shouldn;t be compromised. SO the only questions is how does any changes to the tread compound and casing impact crr or durability/puncture resistance.

So far after about 1000 miles or so, I've found them to be more durable than my previous Michelin's and FAR FAR, more cut resistant. I have had one slow leaker from a pinch flat. Apparently if I went to latex tubes that issue would disapear, but I'm not ready to change just yet. I'm already getting grilled about the cost of this "hobby" by my wife as it is.

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TrainingBible Coaching
http://www.trainingbible.com

further developed Black Chili compound for lowest rolling resistance, high mileage and maximum wet grip
the best tires with facelift, new colors, new design, proven technology
New in 23-571, 20-622 and 28-622 in poor conditions for better grip, puncture protection and greater comfort
Vectran ™ breaker is for maximum puncture protection
Available colors (23mm): black, yellow, red, orange, blue, green, silver, transparent

OMG 650c! I really did not think that was coming. Is it sad how happy I am about this?

A sweet new 20mm to test.

Thumbs up for 23-571. I'm glad they are releasing it in 650c.

...still waiting on GP4000 tubulars with latex tubes.

So yes a 650c 23mm plus a 700c 28mm tire is new and many colors.

The tooling for the tires is the same so the shape itself should not be impacted according to the road product manager Christian Wurmbaeck. The inside of the tires is also unchanged, it is just the rubber coating on the outside and he had no rolling resistance data with him but from the top of his head thought it was 3% faster.

He also told me since the tire first came out there always have been slight changes but they were never announced or talked about. This was big enough to change it to an S II, but not big enough to call it a 5000S.

H

Unfortunately, the 650c version is available only in black :(

Thanks! I'm assuming you meant Crr data, not "aero data" above, right?



We'd already figured that out with the fact that the newer models not only are lighter, but roll significantly faster on the roller tests as well. Good to hear the confirmation though ;-)

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http://bikeblather.blogspot.com/

Oh please...

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http://bikeblather.blogspot.com/

I meant rolling resistance data

I don't mind black but would prefer red. Look is everything. Crr is also important.

Yay! I predict a sale on the 'old' GP4000S's.

although, I guess the ProBikeKit prices were already pretty dang cheap.

Hmmm... might be intersted in a 20mm for my narrow rim non-FC Zipp 404 in front.

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TrainingBible Coaching
http://www.trainingbible.com

Might be a good choice for a 404FC too.

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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

I thought on a wide rim it was a wash, especially when comfort over 112 miles is factored in, especailly with any rough roads. Besides, then I can buy 1 tire and rotate my 1/2 used 23mm 4000s (version 1) to the rear.

I figured it would have a larger impact on a front, narrow rim with clean air, than a wide rear rim tucked behind the frame.

I wonder if the handling is much different, or at least not enough to matter.

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TrainingBible Coaching
http://www.trainingbible.com

On a Zipp 303, which is wider than the 404 and 808, you can see that at some yaw angles the 22mm attack is more aero than the 23mm 4000s:



So, it is possible that a 20mm tire would be a good fast option on the 404 and 808FC, maybe only at low yaw angles, not sure

The 20mm continental supersonic has proved fast for a lot of people even on wide rims, but it also has no puncture belt...a 20mm 4000S will not likely be quite as good.

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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

IMO if you have wide rims and are worried about puncture resistance, get the Attack. Maybe the GP4000 has better high yaw performance when it's new but the Attack has the edge for Crr and aero otherwise. It might do even better if Conti would put the same tread pattern on it as the 4000...

But I'm still running the 20mm SS on my narrow rims...