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Specialized Tarmac
#1
Hello all,

I was looking to replace the BB on my 2010 Specialized Tarmac. I found some description on the BB that reads BC1.37x24. All I know is its a BB30 external bearing type. I wanted to install a ceramic BB from first components but not sure what size to order. Going to pair it up a Shimano Ultegra 6700 Crank. Any help would be great.
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#2
MAybe this will guide you in the right direction!
http://www.bikeforums.net/archive/index.php/t-298772.html
http://weightweenies.starbike.com/forum/viewtopic.php?t=41819
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
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#3
Hi - did you ever figure out if its Enlish and what the measurement is (68mm vs 73mm)?

Thank you.


(04-08-2011, 07:54 AM)Groovejet Wrote:  Hello all,

I was looking to replace the BB on my 2010 Specialized Tarmac. I found some description on the BB that reads BC1.37x24. All I know is its a BB30 external bearing type. I wanted to install a ceramic BB from first components but not sure what size to order. Going to pair it up a Shimano Ultegra 6700 Crank. Any help would be great.
  Reply
#4
English thread for sure, it's a Specialized!!!

30mm x 42mm x 7mm i what your looking for... Usually BB30 bearing is a 6806 you gant order at any bearing shop...
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