• Given they were specced as BSA not really.

    None of the Isen models have BSA BBs.

    It does happen that Paragon thread a bb shell incorrectly but it is extremely rare.

    Not to doubt your anonymous messager but without sharing proof, there's not much point in posting about it here.

  • None of the Isen models have BSA BBs.

    what do you mean ? i certainly installed one. but maybe i am misunderstanding the meaning of bsa

    oh yeah and the clearance is not as advertised and the rear triangle not straight.

  • what do you mean ?

    They're all T47. At least all of the models at the time they stopped making any. Their website is still live wih the specs of each model.

  • maybe i am misunderstanding the meaning of bsa

    BSA is Birmingham Small Arms, an historic manufacturer of guns, bicycles and motorcycles. BSC is a thread specification derived from the earlier CEI spec, featuring a 60° flank angle and 26TPI pitch for most sizes above 1/4". An ISO threaded bottom bracket uses the thread form of BSC with a pitch of 24TPI and a major diameter of 1.37"

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