https://www.etsy.com/uk/listing/1496475520/disc-brake-rotor-coaster-wooden-coasters was the first response for googling "MTB coaster"
@Greenbank started
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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https://www.etsy.com/uk/listing/1496475520/disc-brake-rotor-coaster-wooden-coasters was the first response for googling "MTB coaster"