I removed my bottom bracket as the sr chainset I acquired was fouling the frame. the bb that was in there was a 68/ 122. this seems to be the largest square taper bb that shimano do. i need another 2mm to clear the frame...
Shimano still make a 127mm UN54:
http://www.wiggle.co.uk/p/cycle/7/Shima ... 360027179/
but you might get away with a 2mm spacer under the fixed cup. Sturmey Archer hub spacers work well for this if you don't have something made for the job.
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