I have a FSA Team Issue with titanium bottom bracket. I've put 4-5000 miles on it so far without problem. I like it even if it's slightly less high tech than the ShimaNO or Mega Exo. Haven't been riding recently, recovering from knee surgery.
I had an fsa mega exo crank last year(i think that was the name). I would prefer to not remember. Anyway, I had trouble with it shifting from the 53 to the 39. The chain would skate on top of the 39. I would be riding and shift and it was like the chain had dropped. All of a sudden I would be spinning out of control. Very dangerous. When I called FSA, they said they were having the problem with Shimano users. They never gave me a soultion, nor did they seem like they cared.
I have a FSA SLK compact Carbon 50-34. I have had some problems with the crank arm loosening. A mechanic told me that this has been a problem on my paticular crank. He said that FSA is making a different screw that will help alleviate the problem. Sort of dissapointing with such an expensive crank. I have had the chain drop a few times also when shifting from the 50 to the 34. I found out that it happens when I am on my largest cog. I have stopped down shifting when I am on my largest cog. Since I have done that I have not had a problem.
I have the K-Force and I too have had problems with the screw loosening. I didn't tighten it super hard the first time, so I am hoping that now that I gave it a little extra elbow grease, it'll stay put in the future. I haven't had problems with shifting and I really don't like the looks of the Dura Ace cranks so I hope that does the trick. (I have a Time VXR and the K-Force complements the look of the frame perfectly, while I find the DA clashes a bit with the look of the bike.)
I have a SLK compact mega exo. On the first long ride, the drive side cup backed out a little and I ended up riding easy back to the start. I put a little locktite blue on it and reinstalled it. Almost a year later and no problems. To be fair, I had the same problem with a campy bb a few years back. You really have to torque italian bottom brackets. As far as shifting, I use Record 10 with a standard FD and dropped the chain a few times until I switched to a 36/50. A 36X23/25 is plenty low for me.
I have the FSA Carbon Team and have no problems at all. I have used the TruVative ISIS bottom bracket and will be switching ti over the the FSA Ti bottom bracket for the new season. I absolutely love the FSA Carbon crank and find it to be super stiff and shifts buttery smooth. I have never used Dura Ace or Ultegra so I can not compare though I have always heard good things about both but compared to the Campy Centaur this is much better for me.
SLK Mega EXO never loosened just fine. Platinum Pro Isis w/ Energy Compact, smooth and trouble free. I wonder if the loosening has to do with Italian BBs? As stated above I have found that I have to put a little more torque when tightening. My 2 cents.
I have a set of Superlight cranks with about 11,000 miles on them without any issues. I'm on bottom bracket number 2 with the first lasting about 7,000 miles. The bottom bracket I've been using is the FSA Platinum Pro Titanium, the three bearing version.
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