When the steerer is made of carbon this is problematic because the damaged upper layer could eventually grow into a crack. The friction between the star nut’s sides and the steerer results in scratches. Its sharp edges slide against the inside walls of the steerer until the nut is wedged at the desired spot. Full Carbon ForksĪ star nut is installed into the steerer via forceful taps. When the steerer is made out of carbon, this is detrimental and can lead to cracks.įor that reason, star nuts are used only with steerers made of metal.įor carbon steerers, one has to use a compression plug because it doesn’t scratch the steerer and reinforces it. Condensed Answer: Star nuts scratch the insides of fork steerers during the installation process.
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