60mm should fit well on a disc trucker, have you measured the stay with a caliper to be certain?
Not measured with a calliper but a couple of blogs and things google throws up seem to say 60mm fits nicely on the 26" Trucker Frames but needs to be bent and squeezed for the 700c frames.
@Saffronspokes started
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60mm should fit well on a disc trucker, have you measured the stay with a caliper to be certain?