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Old 10-15-2015, 01:42 PM   #1 (permalink)
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Aerodynamic aids...molded on tires

Yokohama Tires added more 'spoilers' on tire sidewalls. The tiremaker molded angled fins on the side walls to help reduce drag while the tires are spinning. The upper part of the tire side reduces aerodynamic drag while the lower side fins help reduce lift.

How about using this research and ecomod test it on your 'smooth' wheel covers?

News Release | Yokohama Rubber Advancing Tire Aerodynamics Technology

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Old 10-15-2015, 02:24 PM   #2 (permalink)
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Looks like they have changed their design from a while back.

OLD
Interesting Aerodynamic Cars (Mike Vetter's ETV, also Avion) - Page 103 - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com



NEW
News Release | Yokohama Rubber Advancing Tire Aerodynamics Technology
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Old 10-16-2015, 03:00 AM   #3 (permalink)
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Well, RTV in a tube is just the stuff for this!
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Old 10-17-2015, 01:26 PM   #4 (permalink)
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Yoko

Quote:
Originally Posted by botsapper View Post
Yokohama Tires added more 'spoilers' on tire sidewalls. The tiremaker molded angled fins on the side walls to help reduce drag while the tires are spinning. The upper part of the tire side reduces aerodynamic drag while the lower side fins help reduce lift.

How about using this research and ecomod test it on your 'smooth' wheel covers?

News Release | Yokohama Rubber Advancing Tire Aerodynamics Technology
The tire would have to be tuned for every application.(every different car it was installed on).They're free to make any claim they like,but it's a dis-service not to emphasize the context of their claim.
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Old 10-19-2015, 09:50 AM   #5 (permalink)
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Looks to be an interesting article on this main topic.


Surface Finishes - why are they not used on an F1 car
Dimpled Surface Finish

Quote:
Zipp Speed Weaponary, one of the world’s market leaders in racing bicycle wheels hold the world patent on dimpled disc cycle wheels, and they seem to work, being chosen by a number of top teams including some Tour de France front runners. Zipp use a roughly meniscus-shaped dimple with a flat bottom that sweeps upwards near the edges. Apparently this shape is popular in current golf ball design, particularly with manufacturer Titleist.
The above article actual has very little to do with tires, but has value.

2009-10-09
Dunlop's 4th Generation Runflat Tires
http://www.ityre.com/en/main/news/item/16845/

Quote:
The dimples carved on surface of the sidewall provide better heat radiation through turbulent airflow, which shows the effect of reduction of approximately 10%, compared with tires without dimples.
That quote above was taken from the chart in the link above.

The below is a little off-topic, but may be of interest.


2012
Nike's Dimpled Tracksuits Could Help Athletes Shatter World Records At This Summer's Olympics
http://gizmodo.com/5909327/nikes-dim...mmers-olympics
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Last edited by kach22i; 10-19-2015 at 09:59 AM..
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Old 10-19-2015, 05:52 PM   #6 (permalink)
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dimples

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Originally Posted by kach22i View Post
Looks to be an interesting article on this main topic.


Surface Finishes - why are they not used on an F1 car
Dimpled Surface Finish



The above article actual has very little to do with tires, but has value.

2009-10-09
Dunlop's 4th Generation Runflat Tires
News Dunlop's 4th Generation Runflat Tires - www.iTyre.com



That quote above was taken from the chart in the link above.

The below is a little off-topic, but may be of interest.


2012
Nike's Dimpled Tracksuits Could Help Athletes Shatter World Records At This Summer's Olympics
Nike's Dimpled Tracksuits Could Help Athletes Shatter World Records At This Summer's Olympics
Here we go falling into the MythBusters trap.
Reynolds number of tiny bicycle tires,at bicycle velocities don't dovetail very well to larger structures at highway velocities.
Same for runners suit.
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Old 10-20-2015, 04:25 PM   #7 (permalink)
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Speed holes!

What is it in the nature of a dimple that makes it better than an equivalent bump? Surface area?

Quote:
Originally Posted by aerohead
The tire would have to be tuned for every application.(every different car it was installed on).They're free to make any claim they like,but it's a dis-service not to emphasize the context of their claim.
At least the two designs are symmetrical so they don't have to deal with handedness.
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Old 10-20-2015, 05:54 PM   #8 (permalink)
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better

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Originally Posted by freebeard View Post
Speed holes!

What is it in the nature of a dimple that makes it better than an equivalent bump? Surface area?



At least the two designs are symmetrical so they don't have to deal with handedness.
A dimple is lighter.Uses less material.It can't be abraded and worn off.And it doesn't increase frontal area.

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