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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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@fredtc
Edit: just an FYI for future - I sent the same images to Enve and they came back with the following
Thanks for the email! Those markings in the brake track do look to be early signs of brake track damage. This is caused when the brake track/pads heat up whilst descending and the resin in the rim expands. This was the main driving force behind the development of our current brake track with the textured pattern and higher temperature resin, through which we have eliminated this issue.