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Discussion Starter · #1 ·
does anybody already own a tarmac comp torch edition? i think about getting one but i am confused about the bottom bracket, the website says its threaded bb (which i prefer), my local dealer called specialized in holland and they say osbb. then i asked an british dealer who says threaded and another local dealer in austria says osbb again.

the tarmac comp sagan edtion has a threaded bb, i have seen it at my local dealer.

does anybody know?
cheers
thomas
 

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Yes So Cal. Just rode gran fondo San Diego with my wife on this bike. Did the 66 mile version with 4600 ft. Super comfortable,last year I rode 2016 Roubaix expert DI2 with disc. Like this bike much better.
 

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Discussion Starter · #5 ·
wow, could you post a pict of the bb area where i can see the ultegra bottom bracket? thanks in advance.
 

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Will do but it will be later today when I'm home. I think your confusion is torch that is heat sensitive changing colors (Not the comp model) has osbb bottom bracket. All Tarmac comp model's are threaded.
 

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Discussion Starter · #7 ·
i know, the sworks has osbb. and all the other comp models have threaded but specialized told my dealer its osbb at this comp model. and i want to be sure before spending so much money!
 

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Tough to tell from that picture, but i wonder if they pressed a threaded sleeve into the OSBB shell. Pretty common for other mfg's when they want to spec a Shimano crankset.
 

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Discussion Starter · #10 ·
thanks for the pict. got a message from the specialized europe rider care team, all 2017 tarmac sl4 are bsa, also the comp torch edition!
already ordered!
 

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Tough to tell from that picture, but i wonder if they pressed a threaded sleeve into the OSBB shell. Pretty common for other mfg's when they want to spec a Shimano crankset.
Common for a pressed BSA sleeve BB coming from OEM bike manufacturers? Really? Which ones?
Looking at it, I agree it is clearly a Shimano threaded BB which to all is good news :)
Also, it does have the 'look' of a sleeve edge pressed in. Could be better determined without the BB in place. So, it maybe the way Spesh is creating their threaded BSA versions as all higher models of Tarmac now are BB30....this may be basically a BB30 shell with a thread sleeve not just pressed in place...but rather bonded to the BB at the factory.
 

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That's the way to to it with a big carbon BB housing anyway, to have an Al or carbon shell to connect both sides properly, i.e. a proper connection between the two faces, not creaky like many applications of the original BB30 standard which does not specify direct connection.

Good to see that Spesh is going back to BSA. I hope they start a trend.
 

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Common for a pressed BSA sleeve BB coming from OEM bike manufacturers? Really? Which ones?
Of the top of my head, Focus. Or at least they used to. It allowed them to spec Shimano cranks on some builds and FSA BB30 cranks on others while still using the same frame.
 

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Of the top of my head, Focus. Or at least they used to. It allowed them to spec Shimano cranks on some builds and FSA BB30 cranks on others while still using the same frame.
sorry to disagree but all Ford Focuses are BB30.
 

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Discussion Starter · #17 ·
Anyone checked inside the BB to confirm if it's a BB30 -> BSA sleeve pressed or glued into the BB30 alloy inserts ?
its not a bb30 with pressed in bsa sleeve, its a threaded sleeve glued directly into the frame like in the good old days of bsa!
 

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Thanks!
It just looks like the tarmac 2015 -> glued black alu inserts with som kind of BSA adapter (similar to FSA or SRAM)
 

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Thanks!
It just looks like the tarmac 2015 -> glued black alu inserts with som kind of BSA adapter (similar to FSA or SRAM)
Possible that the production carbon fiber mold used for the lower level BSA bike is identical to their higher level BB30 bike they call OSBB. Only difference would be the interior of the sleeve and the OD would be the same.

So the alloy sleeve used for BSA may have a slightly oversize flange to make it the same dimensionally as BB30 which has an ID of 42.0mm. This could only be determined having a BSA and BB30 Tarmac torn down side by side and measure the sleeve OD. Big and small companies like to commonize tooling to save money and would be no surprise. Too bad Specialized doesn't currently want to discontinue BB30 and make all their bikes BSA. But they would give up this increment of market diversity to upsell for Pro and Sworks Tarmacs and other models they need to separate from their lower levels to make more money. Almost a wash in terms of investment cost difference....BSA versus BB30 alloy sleeve insert molded into the carbon costs about the same to manufacture.
 
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