Alternatively, I saw this person mounting the rack on the QR with the help of this part (name unknown?)
It's a fitting that comes with the front rack they have (a Minoura Gamoh porteur). Looks like mickey mouse.
@bsb started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
hamrack
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Alternatively, I saw this person mounting the rack on the QR with the help of this part (name unknown?)