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The fin on the Cartridge Brake shoe holder?

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The fin on the Cartridge Brake shoe holder?

Old 04-23-13, 07:02 AM
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The fin on the Cartridge Brake shoe holder?

OK this is another dumb question from me. For the road bike caliper brake, the cartridge holder has a little fin shape sticking out. What purpose does it serve?
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Old 04-23-13, 07:52 AM
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Supposed to help 'guide' the wheel for faster wheel changes.

Considering my wheel changes are generally fairly slow, it doesn't help me much
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Old 04-23-13, 07:53 AM
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It's aero.
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Old 04-23-13, 08:03 AM
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As stated above, the fin acts as a wheel guide to help you slide the tire between the shoes. Some designs also prevent the pad from being forced out sideways by the wheel when you install it. This used to be more of a problem in the past when shoes had taller profiles than they do today.
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