Ah, found it. Turns out they're good cantis (Suntour SE). But even so they'll not stop that wheel well without a braking surface.
http://www.pedalroom.com/bike/diamondback-response-monster-machine-24883
Looks better in the other pics.
Mavic 721
Surface big enough for rims brakes, still can be used with brake, abet squeal for the next couple weeks.
@edscoble started
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Ah, found it. Turns out they're good cantis (Suntour SE). But even so they'll not stop that wheel well without a braking surface.
http://www.pedalroom.com/bike/diamondback-response-monster-machine-24883
Looks better in the other pics.