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Allan wrote:
Sorry there Dave my mind was definately in Campy mode when i wrote that, as you mentioned this would not work for the shimaNO or other BBs that have a plastic left side cup since those BBs depend on the tightened RH side cup to bear the loads. However it will work for the Campy ones and the outboard ones, as well as all the ones with aluminum cups on both the left and right sides.

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Nope, with *any* Shimano BB regardless of what the left side cup is made of. The driveside cup is fixed and must me torqued against the bottom bracket shell (with or without a spacer)as the left side cup also gets torqued against the bottom bracket shell. If the Drive side cup is *not* tightened against the shell, it is in effect 'floating' and will come loose. On Dura Ace double BB's, the left side cup is tightened until the BB spindle doesn't turn freely, then it is loosened 1/16 to 1/8 turn and the lock ring is tightened and torqued. Your suggestion will only work on bottom brackets that use two adjustable cups such as Phil Wood,

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Steel lover, but then I like Ti with carbon too.
Licensed bike geek.

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