little skinny knobs on side of bicycle tires there for a reason?

Justin Credible

New member
Those little skinny knobs that come out the side of bicycle tires, are they there for a reason? or can i clip them off? because they are getting in the way of my brake pads.
some of them hang down over the rim and the brakes clamp on them sometimes. the brakes clamp over the rim not the tire.
 
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