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i have bikes with and without disc brakes.
the disc brakes are heavier.
issues i experience with conventional side pull road brakes
is when using carbon rims. the brakes squeal and pulse and make noises on descents
noises i don't usually experience when i use my aluminum wheels .
this noise occurs even though i use the cork brake pads
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disc brakes work really good even in a really wet or rainy condition.
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here is one of my bikes with disc brakes