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want to replace creaking bb386 megaEVO BB with ultegra 6800, can't find spacers

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want to replace creaking bb386 megaEVO BB with ultegra 6800, can't find spacers

Old 07-29-17, 09:44 PM
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want to replace creaking bb386 megaEVO BB with ultegra 6800, can't find spacers

Hi All,

I've read through quite a few forums but am still left wondering which spacers or kit i need. The bike I have is a Diamondback Haanjo comp and it has an FSA BB386 mega EVO threaded bottom bracket, which is now creaking. I'm going to go ahead and by a 10mm allen key and a special removal tool, and try to remove, clean , and regrease everything to see if that stops the creaking.

If that doesn't work, I'd like to switch to a Shimano Ultegra 6800 bottom bracket. I can't seem to find the post where someone said that it would work as long as some spacers are used. Many of the posts i read refer to the bb386 evo as a press fit, but the one i have is threaded.

Anyhow, i'm looking for some help on finding out what i need to use the Ultegra 6800 bottom bracket in my frame that is currently using the bb386 megaEVO.

Any help is much appreciated!
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Old 07-30-17, 02:24 AM
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If I understand correctly, you have this bottom bracket that is screwed into a standard 68mm bottom bracket shell.
BB386 crank to BSA frame thread steel bearings - Bottom brackets & spares - Type

Then you should be able to unscrew the current bottom bracket and easily install a Shimano crankset with a compatible bottom bracket.
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Old 07-30-17, 08:04 AM
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yes that's right, i have that exact BB. Oh no, i won't be able to use the existing crankset?! I guess not, now that i'm looking at and understanding more of the technology. I guess the pressure is on for me to really make sure i can fix the creak on my own, because buying a new crankset in addition to a bb is a little more $ than i expected. Thanks for the information, i'd better get to work!
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Old 07-30-17, 08:17 AM
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Before tearing things apart...you did verify the torque on all the fasteners, correct? I had a crankset that creaked, turned out on of the chainring bolts was nowhere near tight enough. The creaking might also have nothing to do with the BB/crank, could be pedals/cleats or stem or seatpost.

I'm very skeptical you need a new crank here to solve your noise, given that you have a threaded BB shell.
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Old 07-30-17, 12:38 PM
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Originally Posted by Marcus_Ti
Before tearing things apart...you did verify the torque on all the fasteners, correct? I had a crankset that creaked, turned out on of the chainring bolts was nowhere near tight enough. The creaking might also have nothing to do with the BB/crank, could be pedals/cleats or stem or seatpost.

I'm very skeptical you need a new crank here to solve your noise, given that you have a threaded BB shell.
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Creaks can come from unexpected places. A couple of years ago, my bike developed a creak under hard pedalling pressure. I did the normal things, disassembling the bottom bracket, lubricating everything without solving the problem. I tried cleaning the saddle clamp,no dice. Finally, I started looking at the rear wheel. This bike has adjustable rear dropouts. All that needed to be done was to clean the interface between the dropout and the frame mount, problem solved.
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Old 07-30-17, 04:10 PM
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Besides the other possible causes, place a drop or two of oil on your jockey wheels and on your pedal spindles and see if that eliminates the creaking. If you're riding on Shimano pedals, repacking the spindle and bearings may also solve the problem

From my experience, BSA style bottom brackets normally grumble when they go bad due to rusted or cracked bearings or they just freeze up. I would be more inclined to go with your hunch of it being the bottom bracket if yours was a press fit, especially on a carbon frame.
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Old 08-12-17, 02:03 AM
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It turned out to be a creaky seatpost! Solved by removing it, greasing it and putting it back in.

I found this out after buying a $30 BB wrench, taking out and regreasing every component of the BB. I also removed the rear derailleur, the rear derailleru hanger, and greased the whole thing. Even removed and opened the jockey wheels. bike still creaked on my left pedal stroke usually and had me baffled. then i decided to try what i thought wouldn't work...the seatpost...and that turned out to be the problem!! Thanks for the input everyone, now my bike rides buttery smooth!
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