Bicycle Mechanics - Can I install a Shimano 6703 crankset on a Cannondale Multisport 1000?

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eurasian
11-01-12, 12:52 AM
Hello all,

I am in the process of converting my 2001 Multisport to drop bars, and the same guy that is selling me his bars, Ultegra shifters and brake calipers has a new Ultegra 10 speed triple 6703 set-up he doesn't need. I would love to put the drivetrain into my bike which started life with an Ultegra 6600 double with a BB5500 bottom bracket. Is this possible? The 10 speed components are from a 2010-11 Trek Madone which I think uses a BB90.

Thanks,
David

eurasian
11-01-12, 02:30 AM
Hello all,

I am in the process of converting my 2001 Multisport to drop bars, and the same guy that is selling me his bars, Ultegra shifters and brake calipers has a new Ultegra 10 speed triple 6703 set-up he doesn't need. I would love to put the drivetrain into my bike which started life with an Ultegra 6600 double with a BB5500 bottom bracket. Is this possible? The 10 speed components are from a 2010-11 Trek Madone which I think uses a BB90.

Thanks,
David

I think I have found the answer to my own question -- I will need to install a SM-BB6700 or a BB7700 to use the crank. Please correct me if this is wrong.

Thanks,
David
HillRider
11-01-12, 08:02 AM
AFAIK, all you will need to use this crank is the appropriate English threaded external bottom bracket cups you listed. Even a BB5700 will work. You will, of course, need a triple compatible front derailleur and shifters.

libero
11-02-12, 07:35 AM
I think I have found the answer to my own question -- I will need to install a SM-BB6700 or a BB7700 to use the crank. Please correct me if this is wrong.


Ultegra 10 speed triple 6703
- I don't have one but in investigating for my triple 6603 cranks and again for my double 6700 cranks, I found that the BB options are quite flexible.
You should be able to run with a BB-7900, BB-6700, BB-5700, BB-5600, BB-4600, BB-7801, BB-6601. (there may be some different prefices in their naming convention e.g.
they call it SM-FC6601 but I called it BB-6601, but if it's a bottom bracket of these numbered series, it will work).
Your mention of a BB7700 on the other hand should not work - that was the 9-speed DuraAce BB which has a very different form factor than those I mentioned.
Source: shimano compatibility charts.