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12 votes

New carbon road bike - scratches discovered on chain stay

Chains can slap against the chainstay. With the condition of roads in the modern United States, it’s almost guaranteed - I can only speak to this country and to Singapore, which doesn’t have freeze-...
Weiwen Ng's user avatar
  • 32.7k
7 votes

New carbon road bike - scratches discovered on chain stay

The regularities and shapes of the scratches suggest IMO that it might be from an interaction with the chain's outer plates. Looks completely superficial/cosmetic to me. I would probably just put on ...
WornChain's user avatar
  • 1,914
6 votes

New carbon road bike - scratches discovered on chain stay

Like others have said, the markings look like they've resulted from the chain scratching the chainstay. This is not uncommon, and protecting the frame with some type of tape is the easiest and the ...
EyeBrown's user avatar
  • 286
1 vote

New carbon road bike - scratches discovered on chain stay

Either caused by chain slap (see other answers, get a chain stay protection) or maybe by being really careless when installing the rear wheel. When you take out the rear wheel, make sure you are in ...
Michael's user avatar
  • 27.9k

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