Bicycle Mechanics - Ultegra 9 double to triple - change BB?
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09-26-06, 11:20 AM
I am switching my double Ultegra 9 speedždouble (FC-6500) to a triple (FC-6503).
Do I have to change the bottom bracket?
From what I measure, the granny would not touch the frame with my current 109.5mm BB.
Anyone tried it?
Yes, you will need a new BB (118.5mm).
Maybe the granny won't touch, but you also have to figure derailleur travel.
118mm BB-6500s can be had on eBay for relatively little.
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