Mansram01

Hi all. I'm looking at buying a frame with a BB386. The questions is, would I be able to mount an FC9000 crankset on my ride? Can't seem to find the answer on the Shimano site. Thanks!

HillRider

BB386 is really a press fit bottom bracket bearing design made for 30 mm bb spindles but there are adapters that let you use the 24 mm spindle used on Shimano Hollowtech II cranks including the FC-9000.

well biked 

Yes, as Hillrider says, with the right adapters it will work. And my recommendation is to not be spooked by the need for adapters, IME they work just fine.

Mansram01

Thanks, guys, for the help! I guess the concern was that I figured that the BB386 frame would be wider to accommodate a 386 EVO type crank and a BB30 (or standard) crank spindle would be too short.

Carbon1

I'm thinking of doing the same thing (Dura Ace 9000 crank in an BB386 Frame) have you done this yet, or found a good solution?

Thanks ;-)

nhluhr

BB386 takes the cue from BB30 of a larger diameter spindle being stiffer but it fixes the massive design error of BB30 of having the bearings spaced so narrowly. BB386 bearings are spaced the same width as the normal Shimano standard external threaded bottom brackets. This was on purpose for a couple reasons, one of which is to make sure it'd be compatible with Shimano cranks.

What you need is a BB386-to-Hollowtech adapter. Here's one of the first ones that turned up on google: BH BB386 Adapter For Shimano | Competitive Cyclist

It's actually the adapter that BH uses for their Shimano builds. BH (along with FSA and Willier) was behind the creation of the BB386 'standard' so they are pretty familiar with it. I happen to have a BH bike from just before they did BB386 that is actually BB30 with their in-house adapter bearings (similar to these but BB30-to-hollowtech) and with over 10,000miles it has been no issue whatsoever. These should be even more reliable since the bearings are actually inside the frame's BB shell (so no lateral forces on the press surfaces).

davidad

Gosh! I sure do love the standards in the bike marketing industry.

glfguy8

You are correct, the spindle on a true BB30 crank will be to short, but a Shimano Hollowtech crank should work fine. I'm running a 6700 crankset in my 386 EVO frame using an FSA PF30 BB and FSA Adapters and have had zero issues.

Carbon1

Thanks for the info ;-) I've been trying to find the spindle length of the Hollowtech II 9000 Dura Ace. Do you know, is it like 113mm ?

I know BB30 uses a 68mm shell width, and I just installed some Sram Red 22s on my bike, but never thought to measure the spindle length.
I'm guessing it is like 110mm ??? I've been having issues with my BB30, mainly creaking, had it apart several times, tried grease, then loctite, then grease again. Then a new crank, I'm pretty much done with this thing, I'm thinking of throwing on a Dura Ace with an adapter but I plan on upgrading to a new BB86 frame in a few months and want to make sure the Dura Ace 9000 will fit the BB86. Looks like it will ;-) but I've yet to see someone running Dura Ace on a Willier, Litespeed or BH, so I was hoping to get some feedback from someone who has done this. Also hoping that it's stiffer and less problematic when it come to noises, creaking.