You’re clothing mayB 2 Aero

[jeduardo]

UCI may be too bored: https://www.roadbikereview.com/reviews/endura-sst-apparel-technology-banned-by-uci

[ultraman6970]

Are they still with the hate to obree????

[Mark McM]

No new rules, or even interpretation of rules, are required for the UCI to make this decision. The rules have longs stated that bicycles can not have fairings or other components added simply for the purpose of aerodynamics. The 3D chevrons applied to this skin suit serve no function except as fairings to improve aerodynamics.

[Rusty Luggs]

https://www.cyclingweekly.com/news/racing/11-changes-uci-rules-regulations-need-know-2019-season-397543

Nothing to do with rules about fairings, a specific interpretation about clothing surface - see #1 in link.

I actually think there have been a number of bikes allowed by UCI that have what could be interpreted as fairings - mostly coverings over brakes. Goofy little flaps on Madone front brake.... Bolide rear brake cover..... seems to meet definition of a fairing as described by UCI....no?

[Mark McM]

https://www.cyclingweekly.com/news/racing/11-changes-uci-rules-regulations-need-know-2019-season-397543

Nothing to do with rules about fairings, a specific interpretation about clothing surface - see #1 in link.

If you read that article, it is exactly about fairings (or things that act like fairings).

With that in mind, the UCI are updating guidance on rider’s clothing for the 2019.

The new regulation says that clothing cannot change the ‘morphology’ (shape) of a rider and bans any non-essential clothing or device other than for protection.

Changes to this rule effectively clarify existing rules from 2018 about clothes not being adapted for any purpose other than clothing or safety

As it says, the new regulations are just a clarification of existing rules, and if something that changes the effective shape of a rider (or component) is not a fairing, I don't know what is/


I actually think there have been a number of bikes allowed by UCI that have what could be interpreted as fairings - mostly coverings over brakes. Goofy little flaps on Madone front brake.... Bolide rear brake cover..... seems to meet definition of a fairing as described by UCI....no?

This I agree with. Although fairings and other devices added purely for aerodynamics have not been allowed, the UCI has been very lax at enforcing this rule.

[Rusty Luggs]

"The 2019 rules say that changes to clothing surface are allowed, but only by assembling the fabric, by weaving or by threading.

The surface roughness of clothing must not exceed 1mm at most and items must not contain any self-supporting elements or rigid parts."

Surface modification like the little silicone chevrons don't act as fairings, they impact boundary layer behavior and when it detaches from the surface to reduce form drag, they don't shield parts from air flow or alter the shape of the rider. Like dimples on a golf ball - you wouldn't call them fairings.....

[smontanaro]

This I agree with. Although fairings and other devices added purely for aerodynamics have not been allowed, the UCI has been very lax at enforcing this rule.

Sitting where I am in the peanut gallery (that is, one who doesn't follow any of this stuff at all), it would seem that time trial helmets serve no added purpose over regular helmets than to improve the aerodynamics of the rider. Shouldn't they be banned?

[rustychisel]

Your


[you're welcome]

[saab2000]

"The 2019 rules say that changes to clothing surface are allowed, but only by assembling the fabric, by weaving or by threading.

The surface roughness of clothing must not exceed 1mm at most and items must not contain any self-supporting elements or rigid parts."

Surface modification like the little silicone chevrons don't act as fairings, they impact boundary layer behavior and when it detaches from the surface to reduce form drag, they don't shield parts from air flow or alter the shape of the rider. Like dimples on a golf ball - you wouldn't call them fairings.....

This is exactly correct. They are not fairings. They are like the dimples on golf balls or the dimples on Zipp wheels.

[Mark McM]

Sitting where I am in the peanut gallery (that is, one who doesn't follow any of this stuff at all), it would seem that time trial helmets serve no added purpose over regular helmets than to improve the aerodynamics of the rider. Shouldn't they be banned?

There's a lot of grey area here. For example, frame tubes are stressed structural members and obviously serve an important purpose. Traditionally, they are round, but if you squeeze a tube down into a tear drop shape, it becomes more aerodynamic - but it still a stresses structural member that holds the frame together. It is not an added component - its just a more aerodynamic version of a needed component

Modern helmets are typically made out of a block of EPS foam, and serve an important purpose as safety equipment. If you were to cast that block of EPS into a tear drop shape instead of a round hemisphere, it still serves its purpose as a safety equipment, and is not an added component - its just a more aerodynamic version of a necessary piece of equipment.

In the case of clothing, weaving and threading are necessary to form and construct clothing, so more aerodynamic weaves and threading are allowed. But adding components to the surface of clothing like silicone chevrons are not necessary to make clothing, so they are not allowed.

[Mark McM]

Surface modification like the little silicone chevrons don't act as fairings, they impact boundary layer behavior and when it detaches from the surface to reduce form drag, they don't shield parts from air flow or alter the shape of the rider. Like dimples on a golf ball - you wouldn't call them fairings.....

Which is why I said, "The rules have longs stated that bicycles can not have fairings or other components added simply for the purpose of aerodynamics."

[93KgBike]

"The 2019 rules say that changes to clothing surface are allowed, but only by assembling the fabric, by weaving or by threading.

The surface roughness of clothing must not exceed 1mm at most and items must not contain any self-supporting elements or rigid parts."

Surface modification like the little silicone chevrons don't act as fairings, they impact boundary layer behavior and when it detaches from the surface to reduce form drag, they don't shield parts from air flow or alter the shape of the rider. Like dimples on a golf ball - you wouldn't call them fairings.....

This rule applied to leg hair, could lead to hilarious results:

Shaving legs (or other body parts) is legal.
Not shaving legs (or other body parts) is legal.
Braiding or otherwise styling leg hair for aerodynamics is not legal. :no:
Beards, mustaches, mutton-chops, etc. may not be coiffed for aerodynamics. :no:
Knuckle-hair may be any length, as long as it is not styled for ... :p

[colker]

I am clothing.