It's a single pivot brake so a little trickier then the front. Two questions .. When you installed did you use a 13mm spanner on the lock nut behind the arms to keep the brake centralised while screwing the Torx frame mounting bolt in? Is the cable outer the correct length and not 'pushing' the brake to one side .. what happens when the cable is completely released does it re-centralise.
It's a single pivot brake so a little trickier then the front. Two questions .. When you installed did you use a 13mm spanner on the lock nut behind the arms to keep the brake centralised while screwing the Torx frame mounting bolt in? Is the cable outer the correct length and not 'pushing' the brake to one side .. what happens when the cable is completely released does it re-centralise.