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Old 05-21-07, 09:25 AM   #1
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Chorus triple on symmetric BB?

I just installed a new Phil Wood bottom bracket on my bike (110.5mm, Campy taper). In the process I noticed that the middle chainring of my Campagnolo Veloce triple crank is looking a little worn with what look like some chips in a couple of the teeth. I've been shopping around for replacement chainrings, and I can almost get a new crankset for what a replacement Campy chainring costs. I've run across some clearance deals on brand new square-taper Chorus triple cranksets that are in the same price range and I'm tempted.

The only problem is that Chorus/Record cranks require an asymmetric bottom bracket that is, I think, 2mm longer on the drive side. Has anyone tried running a Chorus triple on a symmetric BB? What about if I adjusted the Phil BB to shift it 2mm to the drive side? Is it just a matter of chainline, or is there something special about the Chorus/Record triple BB that I'm not taking into account?
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Old 05-21-07, 11:09 AM   #2
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Provided the chainline is correct (strictly a function of the drive-side axle length), then the only effect of an a/symmetrical axle is location of the non-drive side crank arm: non-critical.

Just be sure that if the non-drive side axle is shorter, then it's not too short. Otherwise no worries.
Stupidity got us into this mess - why can't it get us out?

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Old 05-21-07, 12:34 PM   #3
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If I worried about a couple of chipped teeth I'd have to look for false teeth for my head.
Ride it and quit worrying.

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