Old 03-10-23 | 09:06 PM
  #7  
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drlogik
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Bikes: '87-ish Pinarello Montello; '89 Nishiki Ariel; '85 Raleigh Wyoming, '16 Wabi Special, '16 Wabi Classic, '14 Kona Cinder Cone, 2023 Surly Disk Trucker

Looks to me as a cable coating that is abrading off.
Andy's got a good point there. Are the individual strands of wire broken and fraying or just the cable coating? Either way, the shop should check out the cable housing.
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