What BB Do I Need
#1
Thread Starter
Newbie
Joined: May 2012
Posts: 4
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From: Central Illinois
What BB Do I Need
I currently have a 2008 Scott CR1 Pro with a FSA Carbon Pro Team Issue crankset, I current BB has internal bearings which I believe is a BB86. I am stripping this bike to transfer everything to a new titanium frame which has a 68 english BB. I know I need an external bearing BB but I do not know which one for sure, I looked at the FSA site and still was not sure which BB to purchase, any help appreciated.
#2
Thread Starter
Newbie
Joined: May 2012
Posts: 4
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From: Central Illinois
I examined the crankset more and found where it says ISIS Drive on it too, I looked online more and some of the BB's that are ISIS have splines out each side, but do not look like they have external bearings. Anyone have ideas???
#3
Senior Member
Joined: Aug 2005
Posts: 33,657
Likes: 1,119
From: Pittsburgh, PA
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
ISIS bottom brackets are not external bearing designs but very similar to Shimano Octalinks. They have an internal cartridge that is usually threaded into a 68 mm English threaded bottom bracket shell or, more rarely, a 70 mm wide Italian threaded shell. They have splines at both ends of the spindle and the crank arms mate with these splines and are held by threaded bolts.
#4
rebmeM roineS

Joined: Jan 2006
Posts: 16,230
Likes: 363
From: Metro Indy, IN
Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer
TH ISIS BB's available here (and elsewhere):
https://www.nashbar.com/bikes/Product...34_-1___203709
https://www.nashbar.com/bikes/Product...34_-1___203709
__________________
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
#5
Senior Member
Joined: Feb 2009
Posts: 6,660
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This shows the different types. https://www.google.com/search?q=FSA+C...w=1413&bih=659
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