New answers tagged rim-brake
I don't know whether the v-brake replacements fit in. However, normal cantilever brake pads are very easy to find. When you don't find a replacement insert, just order some entire brake pads. You will probably get just as good braking pads for the same price. Edit: Perhaps ask these guys: http://sheldonbrown.com/harris/brakeshoes.html#dura.
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