That extra 5mm can complicate crank compatibility, however. BB30-compatible cranks that feature axle spacers on the non-driveside (such as from Cannondale and SRAM) will work just fine because all you’ll have to do is remove spacers as needed to accommodate the extra width, but BB30 cranks without such spacers (such as from FSA and Specialized) won’t work.

Effectively, the space previously taken up by the bearing cups can now be used as frame real-estate, allowing larger (and stiffer) tubes to be used.

\n\t\t\tShimano SM-BBR60 Ultegra/105 Bottom Bracket BSA

BB shell width 86.5mm road, 91.5mm MTB. Other widths may be named according to shell dimensions: 89.5mm, 104.5mm, 107mm, 121mm, 132mm For us, there are no disadvantages versus a threaded design or a standard BB30. We are able to have a full carbon shell with no metal bonded into the frame, which makes for a stronger, lighter frame structure. Table of crankset standards and compatible BBs (all the cranksets are compatible with the BBs of the same standard, of course, the others needing a special adapter): Crankset standard Cervélo introduced the new BBright system on the R5ca, and while it offers some sound engineering advantages, other companies have been slow to adopt it Immediate Media

The bearings seem to be proprietary,no markings on them. OD 35mm, ID 24mm, inner sleeve width 6mm, outer race width 4mm.Other notes Matches the wide bearing spacing of a BSA external BB with a large 30mm spindle BB392EVO BB386 EVO and BB392 EVO, introduced in 2011, take the oversized principle to extremes. The bearings have the same 86/92mm spacing, width-wise, as conventional threaded external BB, BB90/95, and PF86/92 formats, but it uses BB/PF30’s bigger 30mm diameter spindle. If everything is manufactured as intended, we shouldn’t be dealing with creaking as much as we are currently