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Past reviews have mentioned that the Campy Centaur ACH bottom bracket is not very good. My bike came with one and I was wondering what is so bad about them and if I should replace the one I have right away. Does it tend to grenade a break apart with no warning? Just wondering because some reviews stated that the Centaur ACH was a poor piece of work but failed to mention the why it is so bad. Thanks again.
 

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i'm running those kind of bottom brackets on 2 of my bikes with no problems that i can tell. look it up in the review section of the RBR. or ride it untill the bearings fail in about 20k miles.
 

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which is it?

I think Centaur and ACH are two different models.
http://www.branfordbike.com/cgi-bin...ge=bottombr/bb2.html&ORDER_ID=911232234#item1
http://www.branfordbike.com/cgi-bin...e=bottombr/bb2.html&ORDER_ID=911232234#item1a

If it's the ACH, the only drawback I've heard of is the funky tool needed to remove and install the thing. The interface between the tool and the cups is not very secure and it can be tricky to use. As far as durability in use, I've got about 10,000 miles on one and it seems to be fine. YMMV.
 

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JCavilia said:
I think Centaur and ACH are two different models.
http://www.branfordbike.com/cgi-bin...ge=bottombr/bb2.html&ORDER_ID=911232234#item1
http://www.branfordbike.com/cgi-bin...e=bottombr/bb2.html&ORDER_ID=911232234#item1a

If it's the ACH, the only drawback I've heard of is the funky tool needed to remove and install the thing. The interface between the tool and the cups is not very secure and it can be tricky to use. As far as durability in use, I've got about 10,000 miles on one and it seems to be fine. YMMV.
Centaur used the AC-H bottom bracket until this year. Now there is a cartridge model more like Chorus but with the required 111 mm spindle length for the Centaur crankset. It also installs with the same lockring/BB tool as the Chorus and Record BB cups.

For the OP, I would just use the AC-H until the bearings fail and then replace it with the newer model. It isn't going to fail in a catastrophic manner, and the main difference between the old and the new is about 40 grams of weight savings and the different style cups.
 
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