For future reference the 2008 Surly 1x1 frames (and presumably all other Surlys) take a m10 x 1mm canti brake/stud/mount/whatever you want to call it.
@Po started
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For future reference the 2008 Surly 1x1 frames (and presumably all other Surlys) take a m10 x 1mm canti brake/stud/mount/whatever you want to call it.