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@tjmw
I took this fork (carbon legs/alloy steerer) to my LBS to fit a star nut and crown race. I noticed when I picked it up that the surface is now shinier at the bottom of the steerer (see photo). I asked about it and the mechanic in the shop said he used a thin strip of sandpaper on the steerer to help get the crown race on. I'm absolutely not an expert, but I'd not heard of that before. Is it legit? Any chance it would weaken the steerer?
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