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I have done Furka, Grimsel, Nufenen, Gothard, various smaller French cols and a lot or Ardennes with them , 1 Furka descent with wet roads. Grooved graphene surface and Swissstop black prince pads. I lived to tell the tale and have not noticed any delamination or any other issues on them. I did touch the rim once to get a sense of temperature and it was just warm, not hot to touch. I do pump rather than drag the brakes more on long descents.
I have to say that I am looking into a light shallow alu set for climbing alone. I just want an exta piece of mind running latex tubes that "some" have had issues with. I have been using a XR31t set, but want to go lighter.
edit: I just had a look, it does seem the graphene surface has run off them, think after about 8k km.
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LeMesjeu
@frank9755
People with Light Bicycle rim brake wheels - they seem to reckon the braking is fine nowadays. But has anyone done something like a long, twisty alpine descent and not had toasted rims?