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Chorus bottom bracket install

2K views 5 replies 5 participants last post by  rufus 
wierd instructions...

I've installed many BBs, just as you described, inserting the BB, without the left cup, from the right side, then tightening the right cup, followed by installation and tightening of the left cup.

Campy's current instructions say to remove the right cup and install it first. The right cup can be removed, but I see no point in doing this.

A slight variation is to screw the BB and right cup in first, but not torque the RH cup. Then install the left cup enough to engage the left side cartridge bearing, but not all the way in. Then torque the RH cup, followed by the LH cup.

The idea behind either method is to be sure a cup doesn't catch on the front edge of the cartridge bearing, due to some minor misalignment of the threads. This could deform the leading edge of the cup if it's tightened before sliding over the bearing.
 
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