Images of items I have purchased (except trainers [no feet pics])

Diddums said:
Discs. Finned brake discs.


And what purpose does it serve?
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Rotors

https://www.sigmasports.com/item/Sh...8CjBLz8sDHO7LpSmaNiwy7IWrjvCb1tBoCMJsQAvD_BwE

Thermally managed, performance concieved disc rotors to give you that cutting edge in the corners, and allow you to stop as late as you dare, the Shimano Ultegra R8000 Ice Tech FREEZA Centre-Lock Rotor, 160mm are an innovatively constructed option that radiate heat effectively, leading to reduced fade and wear.
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Lol

A disc brake consists of a metal disc, or "rotor", attached to the wheel hub that rotates with the wheel.[31] Calipers are attached to the frame or fork along with pads that squeeze the rotors for braking
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https://en.m.wikipedia.org/wiki/Bicycle_brake

So a perforated or rotor channeling the air through the rotor to cool it whilst breaking and heating up is guff?

Wow
 
of a metal disc, or "rotor",

The " " don't really help your use of the term!

I struggle to see how the fact that they're vectored help cool a surface that's already fully in contact with moving air. Increased surface area will help though. It doesnt channel the air through the "rotor", just through a tiny tiny additional bit of surface area formed by the slits.
 
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