Oh a Hipster bike? well post some pics of the current brakes attached to the bike and we will point out what you need. if you really want new calipers Tektro will likely be you best bet.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk