Im not sure the 60mm GB will fit as nicely and the 50mm will be a tad narrow, in an ideal world I'd have black guards as well. Will mull it over a for a bit longer. 53mm Bluemels might do the job if I can source one of those extender things you used. What are they called again, rack extenders?
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.
Im not sure the 60mm GB will fit as nicely and the 50mm will be a tad narrow, in an ideal world I'd have black guards as well. Will mull it over a for a bit longer. 53mm Bluemels might do the job if I can source one of those extender things you used. What are they called again, rack extenders?